AU2010101338A4 - Child safety seat, shell and harness - Google Patents

Child safety seat, shell and harness Download PDF

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Publication number
AU2010101338A4
AU2010101338A4 AU2010101338A AU2010101338A AU2010101338A4 AU 2010101338 A4 AU2010101338 A4 AU 2010101338A4 AU 2010101338 A AU2010101338 A AU 2010101338A AU 2010101338 A AU2010101338 A AU 2010101338A AU 2010101338 A4 AU2010101338 A4 AU 2010101338A4
Authority
AU
Australia
Prior art keywords
connection arrangement
connection
child safety
harness
arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
AU2010101338A
Other versions
AU2010101338B4 (en
Inventor
Wieslaw Maciejczyk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Britax Childcare Pty Ltd
Original Assignee
Britax Childcare Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=38577395&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=AU2010101338(A4) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from AU2005251826A external-priority patent/AU2005251826B2/en
Application filed by Britax Childcare Pty Ltd filed Critical Britax Childcare Pty Ltd
Priority to AU2010101338A priority Critical patent/AU2010101338B4/en
Publication of AU2010101338A4 publication Critical patent/AU2010101338A4/en
Application granted granted Critical
Publication of AU2010101338B4 publication Critical patent/AU2010101338B4/en
Anticipated expiration legal-status Critical
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/26—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles for children
    • B60N2/28—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle
    • B60N2/2866—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle booster cushions, e.g. to lift a child to allow proper use of the conventional safety belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/26—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles for children
    • B60N2/28—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle
    • B60N2/2803—Adaptations for seat belts
    • B60N2/2806—Adaptations for seat belts for securing the child seat to the vehicle
    • B60N2/2809—Adaptations for seat belts for securing the child seat to the vehicle with additional tether connected to the top of the child seat and passing above the top of the back-rest
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/26—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles for children
    • B60N2/28—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle
    • B60N2/2803—Adaptations for seat belts
    • B60N2/2812—Adaptations for seat belts for securing the child to the child seat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/10—Safety belts or body harnesses in vehicles specially adapted for children or animals
    • B60R22/105—Safety belts or body harnesses in vehicles specially adapted for children or animals for children

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Child & Adolescent Psychology (AREA)
  • General Health & Medical Sciences (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Seats For Vehicles (AREA)

Description

Regulation 3.2 AUSTRALIA PATENTS ACT 1990 COMPLETE SPECIFICATION FOR AN INNOVATION PATENT ORIGINAL Name of Applicant: Britax Childcare Pty Ltd Actual Inventor: Wieslaw Maciejczyk Address for Service: C/- MADDERNS, GPO Box 2752, Adelaide, South Australia, Australia Invention title: CHILD SAFETY SEAT, SHELL AND HARNESS The following statement is a full description of this invention, including the best method of performing it known to us.
2 CONNECTION ARRANGEMENT RELATED APPLICATIONS The present application for patent is a divisional of Australian Patent Application No. 2005261826 entitled "CHILD SAFETY SEAT, SHELL AND 5 HARNESS", filed 22 December 2005, which is hereby expressly incorporated by reference herein in its entirety. FIELD OF THE INVENTION The present invention relates to child safety seats. 10 BACKGROUND OF THE INVENTION In current child safety seats, the child is restrained in the safety seat by a child harness, which is connected at the top and bottom to the shell of the safety seat. The seat shell itself is connected to the vehicle by means of the vehicle 15 seat belt, for example a lap/sash belt. In addition, it is usual to have a tether strap connected to the shell and to a vehicle anchorage point. Typically, an upper tether strap is connected to a vehicle anchorage point on a shelf behind the rear seat using a latching hook connector. 20 However, the shell of a child safety seat can have imperfections and weak points, which may give way in the event of a collision, thereby compromising the safety of the infant. Furthermore, children of different sizes are not always sufficiently restrained in the safety seat. 25 It is an object of the present invention to reduce or eliminate some or all of the disadvantages of conventional child safety seat arrangements.
3 SUMMARY OF THE INVENTION In a first aspect the present invention accordingly provides a connection arrangement to secure to an anchorage point of a motor vehicle both a child 5 safety harness used with a child safety seat and a tethering means for the child safety seat, the connection arrangement having a first connection means to attach the connection arrangement to the vehicle anchorage point, wherein the connection arrangement is carried by the child safety harness, the connection arrangement upon attachment to the vehicle anchorage point 10 thereby securing the child safety harness to the vehicle anchorage point, and wherein the connection arrangement further includes a second connection means to provide for removable connection of the tethering means. In another form, the first connection means is located at one end of the 15 connection arrangement and the second connection means is located at an other end of the connection arrangement. In another form, the connection arrangement is carried by the child safety harness by an opening in the connection arrangement, the opening allowing 20 the connection arrangement to slidably locate on the child safety harness. In another form, the second connection means includes an aperture to receive a latching hook connector of the tethering means. 25 In a second aspect the present invention accordingly provides a connection arrangement to secure to an anchorage point of a motor vehicle both a child safety harness used with a child safety seat and a tethering means for the child safety seat, the connection arrangement having a connection means to attach the connection arrangement to the vehicle anchorage point, the 4 connection arrangement upon attachment to the vehicle anchorage point thereby securing the tethering means to the vehicle anchorage point, and wherein the connection arrangement is carried by the tethering means by an opening in the connection arrangement that allows the connection 5 arrangement to slidably locate on the tethering means, and wherein the opening in the connection arrangement also includes a receiving region formed in an edge of the opening to receive and locate a latching hook connector of the child safety harness. 10 BRIEF DESCRIPTION OF THE DRAWINGS Illustrative embodiments of the present invention will be discussed with reference to the accompanying drawings wherein: FIGURE 1 is a view of a harness for use according to the present invention; FIGURE 2 is a view a harness for use according to another embodiment of the 15 present invention; FIGURE 3 is a view of a child safety seat arrangement according to a preferred embodiment of the present invention, in operation; FIGURE 4 is a rear view of a child safety seat arrangement according to a preferred embodiment of the present invention; 20 FIGURE 5 is a top rear view of a child safety seat arrangement according to a preferred embodiment of the present invention, attached to a vehicle anchorage point; and FIGURES 6 to 9 show detailed views of mounting arrangements as used in various embodiments of the present invention. 25 DESCRIPTION OF PREFERRED EMBODIMENT Figure 1 shows a child harness 20 consisting of two shoulder straps 21 and a cross strap 22. The shoulder straps are provided with padding 23, and the lower end of each shoulder strap 21 is provided with a loop 24 to receive a 5 vehicle seat belt. The child harness 20 is adjustable in length by means of an adjustable buckle 25, which is covered during use within the padding 24 on one of the shoulder straps 21. There is also a latching hook connector 26 on the upper end of the child harness 20. 5 In Figure 2, the same harness is shown with an additional extension strap 27, which in this instance is adjustable by means of another adjustable buckle 28. The extension strap 27 has a connection buckle 35 that enables attachment to the latching hook connector 26. A second latching hook connector 29 is 10 attached to the other end of the extension strap 27. Figure 3 shows a front view of child safety seat arrangement according to the present invention in operation. A child harness 20 is shown holding the child 31 in a seat shell 30, by means of shoulder straps 21. The harness 20 is passed 15 through a pair of apertures 32 in the seat back of the seat shell 30. The shoulder straps 21 then extend over the child's shoulders and chest. The vehicle lap belt 33 is passed through the loops 24 at the lower ends of shoulder straps 21. The lap belt 33 can then optionally be connected to the seat shell 30 by means of crutch strap 34, which helps keep the lap belt 33 as 20 low as possible. In Figures 4 and 5, there can be seen the mounting arrangements for securing the harness 20 and the seat shell 30 with respect to the vehicle comprising a first mounting arrangement to secure the harness 20 and a second mounting 25 arrangement to secure the seat shell 30. In this illustrative embodiment, the second mounting arrangement includes a tether strap 40 that is connected at one end to the seat shell 30 at connection points 41 and 42, and at the other to a vehicle anchorage point 50 through latching hook connector 43. The length 6 of the tether strap 40 can be adjusted through the adjustable buckle 46, to allow the mounting arrangement to suit different vehicles. As is also shown clearly in Figures 3 to 5, the seat shell includes multiple pairs 5 of apertures 32, 32a and 32b. The harness 20 can be looped through any of these pairs to adjust the height of the shoulder straps 21. It is preferable to have the shoulder straps located close to the child's shoulders, as this gives greater retention of the child in the safety seat. Although multiple pairs of apertures are shown in this preferred embodiment, it would also be possible 10 to have the harness passed through a single aperture in the seat shell. For instance, the shoulder straps could be joined before they are passed through a single aperture. One of the mounting arrangements may include a connecting component or 15 arrangement to connect to the vehicle anchorage point, which is further provided with an aperture or connection means to receive a connecting component which is part of the other mounting arrangement. The connecting component or arrangement which is connected to the vehicle anchorage point can then be shared by both the first and second mounting arrangements. 20 There are, of course, other ways in which a component may be shared. Accordingly, in this illustrative embodiment harness 20 is secured with respect to the vehicle through latching hook connector 26, connection strap 44, buckle 45 and latching hook connector 43. In this instance, it will be noted 25 that latching hook connector 43 is common to both the mounting arrangement for the harness 20, and to the mounting arrangement for the seat shell 30. However, the harness 20 is still secured to the vehicle through an arrangement that does not include the seat shell 30.
7 Of course, the mounting arrangements for securing the harness 20 and seat shell 30 with respect to the vehicle can take other forms. Figures 6-9 show a variety of mounting arrangements for the harness 20 and tether strap 40. In these illustrative embodiments, the connection arrangement is carried by the 5 tether strap 40 (i.e. the second mounting arrangement) by an opening but equally, and as discussed above, the connection arrangement may be carried by the child safety harness 20 (i.e. the first mounting arrangement) in a similar manner. As an example of this interchangeability, the role of the tether strap 40 and harness 20 as depicted in Figures 4 to 9 with respect to the connection 10 arrangement may simply be interchanged in accordance with the present invention. The arrangement in Figure 6 does not require the connection strap 44, and the harness 20 is secured to the vehicle anchorage point 50 simply by means of 15 the two latching hook connectors 26 and 43. As will be noted, the latching hook connector 43 as shown in Figures 6 and 7 includes two apertures to receive both the tether strap 40 and the hook connector 26. Typically, latching hook connectors only include one aperture to receive the strap that they are intended to secure such as the harness 20 or the tether strap 40. However, in 20 the present invention, a single latching hook connector forms a connection arrangement that may be common to both of the mounting arrangements for the harness and for the seat shell. Therefore, it may need to be attached to one or more components from both mounting arrangements. The additional aperture in latching hooked connector 43 (as shown in Figure 6) increases the 25 flexibility in attaching multiple other components to a single latching hooked connector.
8 Figure 8 shows in more detail the mounting arrangement shown in Figures 4 and 5. A tether strap 40 is connected to a vehicle anchorage point 50 through latching hook connector 43. The harness 20 is secured with respect to the vehicle through latching hook connector 26, connection strap 44, buckle 45 5 and latching hook connector 43. In this instance, it will be noted that latching hook connector 43 is common to both the mounting arrangement for the harness 20, and to the mounting arrangement for the seat shell 30. Figures 7 and 9 also show other options for securing a tether strap 40 to the 10 latching hook connector 43, and these alternatives are also envisaged under the present invention. Although a number of embodiments of the present invention have been described in the foregoing detailed description, it will be understood that the 15 invention is not limited to the embodiments disclosed, but is capable of numerous rearrangements, modifications and substitutions without departing from the scope of the invention. Modifications and variations such as would be apparent to a skilled addressee are deemed within the scope of the present invention.

Claims (5)

1. A connection arrangement to secure to an anchorage point of a motor vehicle both a child safety harness used with a child safety seat and a tethering means for the child safety seat, the connection arrangement having a 5 first connection means to attach the connection arrangement to the vehicle anchorage point, wherein the connection arrangement is carried by the child safety harness, the connection arrangement upon attachment to the vehicle anchorage point thereby securing the child safety harness to the vehicle anchorage point, and wherein the connection arrangement further includes a 10 second connection means to provide for removable connection of the tethering means.
2. The connection arrangement of claim 1, wherein the first connection means is located at one end of the connection arrangement and the second connection means is located at an other end of the connection arrangement. 15
3. The connection arrangement of claim 1 or claim 2, wherein the connection arrangement is carried by the child safety harness by an opening in the connection arrangement, the opening allowing the connection arrangement to slidably locate on the child safety harness.
4. The connection arrangement of any one of the preceding claims, 20 wherein the second connection means includes an aperture to receive a latching hook connector of the tethering means.
5. A connection arrangement to secure to an anchorage point of a motor vehicle both a child safety harness used with a child safety seat and a tethering means for the child safety seat, the connection arrangement having a 10 connection means to attach the connection arrangement to the vehicle anchorage point, the connection arrangement upon attachment to the vehicle anchorage point thereby securing the tethering means to the vehicle anchorage point, and wherein the connection arrangement is carried by the 5 tethering means by an opening in the connection arrangement that allows the connection arrangement to slidably locate on the tethering means, and wherein the opening in the connection arrangement also includes a receiving region formed in an edge of the opening to receive and locate a latching hook connector of the child safety harness.
AU2010101338A 2004-06-09 2010-11-29 Child safety seat, shell and harness Expired AU2010101338B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2010101338A AU2010101338B4 (en) 2004-06-09 2010-11-29 Child safety seat, shell and harness

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU2004903092 2004-06-09
AU2005251826A AU2005251826B2 (en) 2004-06-09 2005-06-09 Child safety seat, shell and harness
AU2010101338A AU2010101338B4 (en) 2004-06-09 2010-11-29 Child safety seat, shell and harness

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
AU2005251826A Division AU2005251826B2 (en) 2004-06-09 2005-06-09 Child safety seat, shell and harness

Publications (2)

Publication Number Publication Date
AU2010101338A4 true AU2010101338A4 (en) 2011-01-06
AU2010101338B4 AU2010101338B4 (en) 2011-02-17

Family

ID=38577395

Family Applications (11)

Application Number Title Priority Date Filing Date
AU2007100854A Expired AU2007100854B4 (en) 2004-06-09 2007-09-05 Child safety seat, shell and harness
AU2007100856A Expired AU2007100856B4 (en) 2004-06-09 2007-09-05 Improved tether strap for a child safety seat
AU2008100764A Expired AU2008100764B4 (en) 2004-06-09 2008-08-13 A child safety seat having a harness secured with respect to a tether strap
AU2008100765A Expired AU2008100765B4 (en) 2004-06-09 2008-08-13 A child safety seat having a tether strap with connection means
AU2008100763A Expired AU2008100763B4 (en) 2004-06-09 2008-08-13 Improved tether strap for a child safety seat incorporating a connection means
AU2009100445A Expired AU2009100445B4 (en) 2004-06-09 2009-05-12 A connector for securing a tether strap of a child safety seat
AU2009100837A Expired AU2009100837B4 (en) 2004-06-09 2009-08-21 Means of tethering a child safety seat and child safety harness to a single anchor point in a motor vehicle
AU2009100835A Expired AU2009100835B4 (en) 2004-06-09 2009-08-21 A tethering means for a child safety seat arrangement
AU2009100836A Expired AU2009100836B4 (en) 2004-06-09 2009-08-21 A child safety seat and tethering means and child safety harness for the child safety seat
AU2010101338A Expired AU2010101338B4 (en) 2004-06-09 2010-11-29 Child safety seat, shell and harness
AU2012202655A Active AU2012202655B2 (en) 2004-06-09 2012-05-07 Child safety seat, shell and harness

Family Applications Before (9)

Application Number Title Priority Date Filing Date
AU2007100854A Expired AU2007100854B4 (en) 2004-06-09 2007-09-05 Child safety seat, shell and harness
AU2007100856A Expired AU2007100856B4 (en) 2004-06-09 2007-09-05 Improved tether strap for a child safety seat
AU2008100764A Expired AU2008100764B4 (en) 2004-06-09 2008-08-13 A child safety seat having a harness secured with respect to a tether strap
AU2008100765A Expired AU2008100765B4 (en) 2004-06-09 2008-08-13 A child safety seat having a tether strap with connection means
AU2008100763A Expired AU2008100763B4 (en) 2004-06-09 2008-08-13 Improved tether strap for a child safety seat incorporating a connection means
AU2009100445A Expired AU2009100445B4 (en) 2004-06-09 2009-05-12 A connector for securing a tether strap of a child safety seat
AU2009100837A Expired AU2009100837B4 (en) 2004-06-09 2009-08-21 Means of tethering a child safety seat and child safety harness to a single anchor point in a motor vehicle
AU2009100835A Expired AU2009100835B4 (en) 2004-06-09 2009-08-21 A tethering means for a child safety seat arrangement
AU2009100836A Expired AU2009100836B4 (en) 2004-06-09 2009-08-21 A child safety seat and tethering means and child safety harness for the child safety seat

Family Applications After (1)

Application Number Title Priority Date Filing Date
AU2012202655A Active AU2012202655B2 (en) 2004-06-09 2012-05-07 Child safety seat, shell and harness

Country Status (1)

Country Link
AU (11) AU2007100854B4 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2478345A (en) * 2010-03-05 2011-09-07 Neil Leighton Griffiths Car seat harness for children

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GB1256383A (en) * 1969-03-28 1971-12-08 Kl Automotive Products Ltd Improvements in and relating to children's safety seats for use in vehicles and craft
GB1328336A (en) * 1971-02-04 1973-08-30 Vauxhall Motors Ltd Seat belt devices
US5265931A (en) * 1991-11-07 1993-11-30 Ontario Cripple Children's Centre Detachable child seat and supporting frame
US5292176A (en) * 1992-09-04 1994-03-08 Babystar Inflatable child vehicle seat
AUPM715494A0 (en) * 1994-08-01 1994-08-18 Britax Child-Care Products Pty Ltd Safety seat tether strap
CA2160811A1 (en) * 1995-10-18 1997-04-19 Bill D. Rich Supplementary restraint system
AU715321B2 (en) * 1996-01-10 2000-01-20 Igc (Australia) Pty Ltd Harness and booster seat
AU750497B2 (en) * 1996-01-10 2002-07-18 Igc (Australia) Pty Ltd Harness and booster seat
US5909927A (en) * 1998-04-10 1999-06-08 Henshall; Charles A. Airplane passenger and lap child restraint system
AUPQ387299A0 (en) * 1999-11-05 1999-12-02 Igc (Australia) Pty Ltd Improved child restraints
AU776444B2 (en) * 2000-04-14 2004-09-09 Britax Childcare Pty Ltd A tether strap for a rearwardly facing safety seat
US6457774B2 (en) * 2000-06-06 2002-10-01 Britax Child Safety Inc. Child safety seat
AUPQ845100A0 (en) * 2000-06-30 2000-07-27 Britax Child-Care Products Pty Ltd Attachment of child shoulder harness to a booster seat
AU781955B2 (en) * 2000-06-30 2005-06-23 Britax Childcare Pty Ltd Attachment of child shoulder harness to a booster seat
US6543847B2 (en) * 2000-09-22 2003-04-08 Cosco Management, Inc. Juvenile seat assembly having harness strap retainer apparatus
ES2295290T3 (en) * 2001-08-21 2008-04-16 Britax Excelsior Limited SAFETY SEAT FOR CHILDREN.
DE102005025570B4 (en) * 2005-06-03 2008-05-29 Daimler Ag Child seat for vehicles
AU2008100722B4 (en) * 2008-02-20 2008-09-25 Infa Products Pty Ltd Anchor System for a Child Safety Seat
AU2008100191B4 (en) * 2008-02-29 2010-04-22 Infa Products Pty Ltd Anchor system for a child safety seat

Also Published As

Publication number Publication date
AU2009100837B4 (en) 2009-12-24
AU2009100835B4 (en) 2009-11-19
AU2009100836B4 (en) 2009-11-19
AU2008100765A4 (en) 2008-09-25
AU2007100856B4 (en) 2007-09-27
AU2009100836A4 (en) 2009-10-01
AU2009100837A4 (en) 2009-10-01
AU2009100835A4 (en) 2009-10-01
AU2009100445B4 (en) 2010-01-07
AU2007100854A5 (en) 2007-09-27
AU2007100856A5 (en) 2007-09-27
AU2009100445A4 (en) 2009-06-11
AU2012202655B2 (en) 2014-11-27
AU2008100763A4 (en) 2008-09-25
AU2008100764A4 (en) 2008-10-02
AU2008100765A8 (en) 2008-10-09
AU2008100764B4 (en) 2009-02-19
AU2007100854B4 (en) 2007-09-27
AU2008100763B4 (en) 2009-04-02
AU2012202655A1 (en) 2012-05-24
AU2010101338B4 (en) 2011-02-17
AU2008100765B4 (en) 2009-02-19

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Date Code Title Description
FGI Letters patent sealed or granted (innovation patent)
FF Certified innovation patent
MK22 Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry