CN1493057A - Wireless handwriting sckeme - Google Patents
Wireless handwriting sckeme Download PDFInfo
- Publication number
- CN1493057A CN1493057A CNA018159044A CN01815904A CN1493057A CN 1493057 A CN1493057 A CN 1493057A CN A018159044 A CNA018159044 A CN A018159044A CN 01815904 A CN01815904 A CN 01815904A CN 1493057 A CN1493057 A CN 1493057A
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- transmitter
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
- G06F3/0433—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves in which the acoustic waves are either generated by a movable member and propagated within a surface layer or propagated within a surface layer and captured by a movable member
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Position Input By Displaying (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
A system for tracking motion of a writing device in accordance with the invention includes a substantially omni-directional transmitter attached to the writing device and a plurality of semi-cylindrical receivers capable of receiving, over a substantially planar area, one or more pulses generated by the substantially omni-directional transmitter.
Description
Related application
The title of this patented claim and J.Xu is the pendent U.S. Patent application No.09/507 of " Ultrasonic Wireless PenPosition Determination System and Method " (ultrasound wave wireless pen positioning system and method), 078 is relevant, this pendent U.S. Patent application is transferred to assignee of the present invention, and at this by the reference combination.
Invention field
The disclosure relates to the hand-written scheme of electronics, and more particularly, relates to the hand-written scheme of wireless electron.
Background of invention
Along with calculation element more removableization that become, such as utilizing personal digital assistant (PDAs), laptop computer and handheld computer, for example entering data into multiple mode may be desired within such device.The classic method that information is input within such calculation element comprises, for example, and keyboard and pointing device.Usually, such traditional data input method comes down to by using electric signal transmission information to be done.In some cases, hand-written information being input to may be desired in such calculation element.The current method that is used to import this hand-written information for example comprises the wireless pen system.Yet current wireless pen system generally has some shortcoming.These shortcomings for example may comprise jumps and rotation error.About this point, if for example one from the one way signal of wireless pen not by suitably directed, jumping then may occur.Discontinuity in the hand-written information that the orientation of this mistake may cause not wishing to obtain.Similarly, about this point, in using the system of this one way transmitter, the natural tendency that rotation error may rotate when writing by the person of writing and causing.This rotation may cause irrelevant information to be hunted down.The result that an example of this type of irrelevant information can be used as following situation occurs, promptly in this system, when nib one with respect to the settling position substantially of receiver in rotating penholder.This rotation may cause system to be explained subsequently, for example, and a undesirable arc.In addition, transmit the art methods of this information and can use a synchronization mechanism, it may be the increase of this wireless pen system for example cost, complexity and power consumption.Such synchronization mechanism may be simultaneously is disadvantageous for the movability of this system, because such mechanism may increase add ons and therefore increase the size of this system.Therefore, the optional wireless pen scheme that solves at least some foregoing problems is desired.
Description of drawings
Pointed out especially and clearly requirement of quilt at the latter end of instructions as main points of the present invention.Yet by when utilizing accompanying drawing to read, understanding structure of the present invention, method of operating, feature and advantage well, wherein with reference to following detailed description:
Fig. 1 is a block diagram, and the existing embodiment of a wireless electron hand writing system has been described.
Fig. 2 is a block diagram, and another existing embodiment of wireless electron hand writing system has been described.
Fig. 3 is a block diagram, and an embodiment according to wireless electron hand writing system of the present invention has been described.
Fig. 4 is a block diagram, and an embodiment according to ultrasonic emitting machine of the present invention has been described, it may for example be used by the embodiment among Fig. 3.
Preferred forms
In the detailed description below, a large amount of details for provide one to of the present invention understand completely illustrated.Yet the present invention also may leave these details and be put into practice, and this point will be understood by those skilled in the art.In other cases, well-known method, program, element and circuit are not elaborated, in order to avoid make the present invention unclear.
As what before pointed out, except traditional method, it is desired that information is input to a method in the calculation element.Also as what before pointed out, by using a wireless pen system, such replacement method can be done.The embodiment of wireless pen system although it is so exists at present, but may there be some shortcoming in these systems.For example, as what before be discussed, such system may be jumped or mistake such as the rotation that is used in a writing station among such embodiment owing to write motion normally.Such system may be subjected to various " dead zones " do not expected simultaneously, and after this this will discussed in more detail.In addition, such system is general to use a plurality of transmission/reception techniques, and for example, one is used for synchronously and another is used for the position and determines.Except undesirable be that this system increases cost, complexity and the power consumption, uses so a plurality of technology can also lower owing to the movability that is used for the caused this embodiment of interpolation of synchronous element.
In this respect, Fig. 1 is a block diagram, and the current embodiment 100 of a wireless pen system has been described.Embodiment hereto, a writing station 150 comprises a transmitter 160.This transmitter can comprise a plurality of can be used for transmitting for example infrared ray (IR) signal and unidirectional ultrasound wave respectively, or the element of sound, pulse.In alternative embodiment, the radio frequency of a separation (RF) transmitter can be used to replace for example infrared transmitter.As in greater detail following, these signals and pulse can be respectively applied for synchronously then and the position is determined.Yet in this respect, a sensor/receiver device such as 110, can comprise sensor 170, and it can be used to receive such infrared signal, also has separation sensor 140, and it can be used to receive such acoustic impluse.Such equipment also comprises an interface, and such as cable 120, it is used for such device coupled to a calculation element is caught hand-written information with the form of electronics at least in part.Such signal and pulse generally can be for infrared signal and ultrasonic pulse with certain predetermined frequencies and being produced substantially, so that make catching of hand-written information be more prone to by using such as those technology that are discussed herein.
Because sensor 170 and receiver 140 are installed closer to each otherly substantially, so the timing relationship of received like this infrared signal and acoustic impluse can be used to determine the position of this writing station.In this respect because infrared signal to be propagating near the speed of the light velocity, so no matter transmitter 160 with respect to such sensing station how, such infrared signal all can arrive sensor 170 substantially simultaneously.About this point, from catering to the need, transmitter 160 usually can be in the position of reasonable proximity transducer 170, so that allow such infrared signal relevant with hand-written information and ultrasonic pulse for example to be received by sensor 170 and receiver 140.This distance generally can be general no more than several feet and generally be defined into one and write the surface, such as 130.
Opposite with such infrared signal, because acoustic impluse is with the speed propagation of the general velocity of sound, so generally can exist in some delays determined that arrive between a receiver 140 and another receiver.This delay may be at least in part based on the position of the transmitter that is used for producing the acoustic impluse relevant with such receiver.According to timing relationship, can be determined by the operating speed equation with a relative distance of the transmitter 160 of each sensor at corresponding sensor or received infrared signal in receiver place and received acoustic impluse.This equation is well-known for those those of ordinary skills, and the invention is not restricted to be used for determining any particular technology of this distance.
Such relative distance can be used for determining the position of transmitter 160 with respect to receiver 140.Because such receiver is mounted approachingly substantially, as previously discussed, triangulation calculation can be at least in part by based on the relative distance of the receiver degree of approach and transmitter and receiver and calculate.Such triangulation calculation is well-known to those skilled in the art, and the present invention is not restricted to any special method.
Yet this embodiment that has been illustrated in Fig. 1 has some shortcomings, and it relates to the transmitter-receiver structure at least.In this respect, because transmitter 160 comprises an one way transmitter, so the orientation of writing station 150 in such embodiments can be determined: for example, infrared signal and acoustic impluse are received by sensor 170 and receiver 140.Therefore, the user of this system may be restricted in writing motion owing to this structure.This may be disadvantageous, promptly may be not suitable for the normal motion that is associated with hand-written information, such as the inclination of rotation and this writing station.Because sensor 160 is with respect to the reformed orientation of sensor 140, such rotation or inclination can cause jumping discontinuity or irrelevant information in captive hand-written information.
Such embodiment may be also owing to various factors is subjected to multistage dead zone.In this respect, for example as shown in Figure 1, the typical structure of receiver such as 140 and 170 sensor has limited them and may be able to receive the angle of acoustic impluse or infrared signal.Outside this angular range, though hand-written information within the zone of writing incoming interface 130, it also can't be collected.Because it has lowered that the user can lean on that this system uses the available zone that writes is so this is disadvantageous.The dead zone also may produce from transmitter for example such as 160 structure.Although be not illustrated in Fig. 1, a such dead zone still can belong to the distance of transmitter 160 and sensor 140 when hand-written information is collected in expectation at least in part.Because such transmitter generally has the big acoustic reactance of the air that compares,, the reflection of a loud noise pulse causes the important decay of a such pulse so may occurring.Such reflection is impedance mismatching due to, and this point is well-known to those skilled in the art, and it is similar to the signal reflex of the mismatch of electrical impedance due in transmission line.The decay that causes owing to such mismatch may limit subsequently, and the user can be used for from the scope of this receiver collection hand-written information according to such an embodiment.In brief, a dead zone may be positioned at outside this scope.
Simultaneously, as previously pointed out, owing to may cause increasing cost, may be undesirable so not only used sensor 140 but also used receiver 170 for this embodiment.The reason that common this structure exists to small part because such sensor and the receiver ability of receiving infrared-ray signal acoustic impluse respectively.This increase on cost usually is undesirable.
Fig. 2 has illustrated the embodiment of the wireless pen system that another is current, and it is usually connected same xerotripsis plate and uses.Fig. 2 comprises two views of this embodiment, a side-looking Figure 200 and a top view 205.Embodiment hereto, writing station 250 comprises an infrared ray (IR) transmitter 260 and a ultrasonic emitting machine 270.In this respect, IR transmitter 260 can by with IR sensor 230 unite make be used to provide one with previously described substantially similar synchronizing function.For this embodiment, sensor/receiver device 210 comprises IR sensor 230, receiver 240 and deflector 220.For this embodiment, ultrasonic pulse is received machine 240 then with deflector 220 deflections and receives.Though this structure may can brought some improvement aspect the size of the caused dead zone of received angle owing to signal,, the size in this kind dead zone still may depend on the specific deflector structure that is used at least in part.In addition, because the IR sensor among these embodiment has and the similar receiving angle of before having discussed usually, so because the restriction of these sensors and they receive the ability of outer or some the extraneous synchronizing signal of some angle, a dead zone may also exist.
Just as previously noted, this embodiment usually unites to use with an xerotripsis plate and catches hand-written information electronically.About this point, can use the facilities 290 that can comprise suction apparatus.In addition, cable 285 can be used for such receiver device is coupled to a calculation element so that help is for example being write the hand-written information electronic collection on the surface 280., such sensor device have a previous discussion with use the relevant shortcoming of a plurality of sensors.For this embodiment, the dirigibility of using IR sensor 230 and receiver 240 may reduce this device also increases the cost of this embodiment simultaneously.In addition, depend on the ultrasonic emitting machine such as 270 ad hoc structure, these embodiment also may experience because transmitter and the distance of sensor 240 are caused and jump over, rotate mistake and dead zone, as previous all discussion.Therefore, the alternative embodiment of wireless pen system may be desirable.
Fig. 3 has illustrated the embodiment according to a wireless pen system of the present invention, and it handles at least some aforesaid shortcomings.For this certain embodiments, though the present invention is not limited in the scope of this respect, writing station equipment 350 comprises an omnidirectional cylindric ultrasonic emitting machine.For this embodiment, receiver device 310 comprises semi-cylindrical receiver 330 simultaneously.Though the present invention is not limited in this respect, receiver 330 can comprise an electric capacity piezoelectric polymer film, such as polarization polyvinylidene fluoride (PVDF).This film be for those skilled in the art know and for example from measuring extraordinary product (Measurement Specialties) company, product sensor branch office, 950 Forge Avenue-B1dg.B, Norristown, PA 19403 obtains.These receivers are favourable in many aspects.
For example, as illustrated in fig. 3, this receiver structure can reduce the dead zone size that may exist in the conventional method, and is just as described earlier.In this respect, at least in part because their semi-cylindrical configuration, these receivers can be at a received pulse or a signal on the scopes of 180 degree or the smooth basically zone basically.As shown in Figure 3, this embodiment dead zone can be defined in the angle from the direct-path of transmitter to the second sensor by a sensor at least in part.In this case, first sensor may disturb from the pulse in the transmitter, and this may influence the ability that it reaches second sensor., even so, compared to Figure 1, use such an embodiment to reduce the size in zone, dead zone.
The potential advantage of another of this structure can come from the same synchronizing signal of meeting and a P-pulse uses these receivers together, just as has been described previously.In this, a RF signal can be by being used to encourage an electronic impulse of ultrasonic emitting machine 360 to produce.Such pulse for example can be produced by a converter that is arranged in the pen cap 350.This kind driving pulse is well known to those skilled in the art and is a kind of method of sending acoustic pulses at the ultrasonic emitting machine in such as 360.This pulse for example can produce by a converter or by a discharge resistance capacitance (RC) circuit.Other technology that is used to produce this excitation exists and the present invention is not limited to aforesaid this certainly.This RF signal can side by side be received machine 330 receptions then substantially and determine the relative distance of transmitter from receiver to be used in a kind of similar mode of before having described.In such an embodiment, because sensor/receiver of second group is not used for receiving a synchronizing signal, so the dirigibility of these embodiment is at least in part because reducing of these embodiment sizes and can be modified.In addition, for example the cost of these embodiment can be reduced.
As the another one example, at least in part because the omnirange structure of transmitter 360, the shortcoming of the then previous rotation mistake of discussing can also be lowered, because these rotation mistakes are at least in part because the direction property of the transmitter that uses among the embodiment and often occurring in front.For this embodiment, writing station that comprises such transmitter will not influence the ultrasonic pulse characteristic that is produced by such transmitter at receiver 330 places basically such as 350 rotation.At least in part since this on the one hand, writing station can not influence of such writing station position basically such as 350 rotation and accurately determines.In addition, because the cylindrical-shaped structure of such omni-directional transmissions machine approaches for example 350 top of recording unit so it can be located opposite from.This respect can be favourable, because it can reduce retroaction, such as the extraneous information that may come from such writing station that tilts.In this respect, transmitter is placed the radius that has more closely reduced the arc that during this tilts, moves from a top.Therefore this radius that reduces can reduce total distance that transmitter moves along this arc, and then has reduced the quantity of extraneous information again.
For this certain embodiments, receiver device 310 is coupled to calculation element 370 by cable 320.This can allow calculation element 370 to receive from the electronic information in the receiver device 310.The present invention is not limited in the scope of this respect certainly and alternative embodiment can exist.For example, sensor 330 can be included in the calculation element 370 opposite with such receiver device 310, and this receiver device 310 is coupled to such computing equipment by cable 320.Yet for this certain embodiments, the electronic information that transmits by cable 320 can further be gone through so hereinafter.
Fig. 4 has illustrated the embodiment according to a kind of omni-directional transmissions machine 400 of the present invention, and it can reduce the dead zone relevant with the acoustic impedance mismatch of previous discussion.Such transmitter can be used as the transmitter in the writing station 350 360, and is just as discussed previously.Though the present invention is not limited in this scope or any special configuration, transmitter 400 can comprise a columned epoxy resin substrate 400 and comprise a matrix of piezoelectric rods, such as 42.Be compared to existing equipment, such structure may cause lower acoustic.In this respect, the acoustic impedance of such transmitter can reduce about order of magnitude.This minimizing in the acoustic impedance of such transmitter and then can improve with the impedance mismatching of air and increase the radius that its outer previous dead zone of discussing occurs, this is desirable.
The method according to this invention embodiment can use the embodiment of wireless pen system, as illustrated in fig. 3.Though this method can be embodied in an instruction on the storage medium, it can be performed such as 370 by a calculation element, and the present invention so is not limited certainly.This method embodiment can also use the technology that is used for determining the writing station position as before having discussed.For example, an embodiment of this method can comprise synchronizing signal of generation, is produced such as the result who can be used as a driving pulse.This method embodiment can also comprise: produce a ultrasonic pulse then based on the timing relationship of synchronizing signal and ultrasonic pulse determine with from the relative distance of a plurality of sensors.This method can also comprise: determine the position of a writing station by using triangulation calculation, this kind result calculated at least in part based on receiver such as 330 the degree of approach and the relative distance of determining by timing relationship.Though the present invention so is not limited, be generally the synchronizing signal of simulation and the numeral that ultrasonic pulse can be converted into those signal/pulses.These numerals can be used to then then determine that a writing station is with respect to receiver for example 330 relative distance and position.
Though illustrated and described some feature of the present invention, can expect many modifications for a person skilled in the art, substitute, change and equivalent at this.Therefore should be appreciated that accessory claim is intended to cover all such modification and the change that drops within the practicalness of the present invention.
Claims (20)
1. one kind is used to follow the tracks of the system that writing station moves, and comprising:
Append to an omnidirectional basically transmitter on described this writing station; With
A plurality of half-terete receivers, described half-terete receiver can receive by these one or more pulses that omnidirectional transmitter produced basically on a smooth basically zone.
2. the system as claimed in claim 1, wherein, described omnidirectional basically receiver comprises a ultrasonic emitting machine.
3. the system as claimed in claim 1, wherein, described omnidirectional basically transmitter comprises a kind of columned basically transmitter.
4. system as claimed in claim 3, wherein, described columned ultrasonic emitting machine comprises a base material and a piezoelectric.
5. system as claimed in claim 4, wherein, described piezoelectric comprises a plurality of rods that are distributed in the described base material.
6. the system as claimed in claim 1, wherein, described receiver comprises a piezoelectric polymer film.
7. the system as claimed in claim 1, wherein, described a plurality of receivers be arranged at known relative position sentence make can be at least in part based on the position determining described transmitter relative time of arrival of described one or more pulses.
8. system as claimed in claim 7, wherein, described receiver can also receive one basically simultaneously synchronizing signal as a benchmark that is used for determining described relative time of arrival.
9. system as claimed in claim 8, wherein, described synchronizing signal is at least in part based on a driving pulse of the described machine of omni-directional transmissions basically.
10. system as claimed in claim 8, wherein, described a plurality of receiver is coupled to a processor by an interface, and described processor can be by at least in part based on using described relative time of arrival triangulation calculation to determine the described position of said write device.
11. system as claimed in claim 10, wherein, described processor is included in the calculation element.
12. system as claimed in claim 11, wherein, described calculation element comprises in essence by following at least one calculation element forming: personal computer, personal digital assistant and internet tablet.
13. a method that writes down the information that writing station produced of use electronically comprises:
From a transmitter, produce omnidirectional basically one or more pulses;
On a smooth basically zone, receive described one or more pulses; With
State a position determining described transmitter relative time of arrival of one or more pulses at least in part based on difference place on described smooth basically zone.
14. method as claimed in claim 13 also comprises:
Produce a synchronizing signal;
Described difference place on described smooth basically zone side by side receives described synchronizing signal basically,
Wherein determine described relative time of arrival based on described synchronizing signal at least in part.
15. method as claimed in claim 14, wherein, described synchronizing signal is at least in part based on a driving pulse for described transmitter.
16. method as claimed in claim 14 wherein, determines that the described position of described transmitter comprises:
At least in part based on determining the distance of described transmitter described relative time of arrival to difference on described smooth basically zone; With
Calculate the described position of described transmitter at least in part based on described distance.
17. method as claimed in claim 16 wherein, is calculated described position and is used triangle formula.
18. article comprise: a storage medium of having stored instruction on it makes a calculation element have following function when these instructions are performed:
Receive one or more synchronizing signals;
Difference place on a smooth basically zone receives omnidirectional basically one or more pulses; With
Determine the position of transmitter at least in part based on a timing relationship between described one or more synchronizing signals and the described one or more pulse.
19. article as claimed in claim 18, wherein, the described difference place of described one or more synchronizing signals on described smooth basically zone side by side is received basically.
20. article as claimed in claim 19, wherein, described instruction makes a calculation element also have following function when being performed:
Determine that at least in part described transmitter is to the distance separately at described smooth basically the above difference of zone the relative time of arrival of stating one or more pulses based on the described difference place on described smooth basically zone; With
Determine the described position of described transmitter by using described distance separately.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66636300A | 2000-09-20 | 2000-09-20 | |
| US09/666,363 | 2000-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1493057A true CN1493057A (en) | 2004-04-28 |
Family
ID=24673877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA018159044A Pending CN1493057A (en) | 2000-09-20 | 2001-09-20 | Wireless handwriting sckeme |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN1493057A (en) |
| AU (1) | AU2001289143A1 (en) |
| DE (1) | DE10196652T1 (en) |
| GB (1) | GB2381640B (en) |
| WO (1) | WO2002025577A2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7109979B2 (en) | 2002-02-08 | 2006-09-19 | Virtual Ink Corporation | System and method for recording writing performed on a surface |
| US20090295759A1 (en) * | 2008-05-29 | 2009-12-03 | Sony Ericsson Mobile Communications Ab | Wireless touch screen pen |
| CN102375624A (en) * | 2010-08-27 | 2012-03-14 | 刘中华 | Ultrasonic handwriting board of flat plate structure |
| EP3861110A1 (en) | 2018-10-02 | 2021-08-11 | Novozymes A/S | Endonuclease 1 ribonucleases for cleaning |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4012588A (en) * | 1975-08-29 | 1977-03-15 | Science Accessories Corporation | Position determining apparatus and transducer therefor |
| CH669676A5 (en) * | 1986-01-23 | 1989-03-31 | Zellweger Uster Ag | |
| ES2005624A6 (en) * | 1987-09-16 | 1989-03-16 | Ezquerra Perez Jose Manuel | Method to determine the position and the state of an object using ultrasonics. |
| CA2149213A1 (en) * | 1992-11-17 | 1994-05-26 | Thomas Debuisser | Method and device for capturing and processing graphical information |
| FR2698191A1 (en) * | 1992-11-17 | 1994-05-20 | Lectra Systemes Sa | Acquisition and processing of graphic data |
| WO1995014286A1 (en) * | 1993-11-17 | 1995-05-26 | Microsoft Corporation | Wireless pen computer input system |
| JPH0922324A (en) * | 1995-07-05 | 1997-01-21 | Canon Inc | Coordinates input device |
| US6731270B2 (en) * | 1998-10-21 | 2004-05-04 | Luidia Inc. | Piezoelectric transducer for data entry device |
| JP2001236451A (en) * | 2000-02-21 | 2001-08-31 | Oki Data Corp | Electronic document creation system |
-
2001
- 2001-09-20 GB GB0303837A patent/GB2381640B/en not_active Expired - Fee Related
- 2001-09-20 WO PCT/US2001/029693 patent/WO2002025577A2/en active Application Filing
- 2001-09-20 CN CNA018159044A patent/CN1493057A/en active Pending
- 2001-09-20 DE DE10196652T patent/DE10196652T1/en not_active Withdrawn
- 2001-09-20 AU AU2001289143A patent/AU2001289143A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| GB2381640B (en) | 2005-02-23 |
| GB0303837D0 (en) | 2003-03-26 |
| WO2002025577A2 (en) | 2002-03-28 |
| DE10196652T1 (en) | 2003-08-07 |
| GB2381640A (en) | 2003-05-07 |
| WO2002025577A3 (en) | 2003-03-13 |
| AU2001289143A1 (en) | 2002-04-02 |
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