ES2108042T3 - Sistema de telemensajeria con acuse de recibo por satelite. - Google Patents
Sistema de telemensajeria con acuse de recibo por satelite.Info
- Publication number
- ES2108042T3 ES2108042T3 ES91902502T ES91902502T ES2108042T3 ES 2108042 T3 ES2108042 T3 ES 2108042T3 ES 91902502 T ES91902502 T ES 91902502T ES 91902502 T ES91902502 T ES 91902502T ES 2108042 T3 ES2108042 T3 ES 2108042T3
- Authority
- ES
- Spain
- Prior art keywords
- receipt
- satellite
- telephone system
- verified
- communicating
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/18—Service support devices; Network management devices
- H04W88/185—Selective call encoders for paging networks, e.g. paging centre devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18567—Arrangements for providing additional services to the basic mobile satellite telephony service
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radio Relay Systems (AREA)
- Mobile Radio Communication Systems (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
SISTEMA DE AVISO CON CONFIRMACION DE RECEPCION BASADO EN UN SATELITE. UN SISTEMA DE COMUNICACION DE AVISO CON CONFIRMACION BASADO EN UN SATELITE COMPRENDE, AL MENOS, UN SATELITE (102) CAPAZ DE COMUNICAR LA INFORMACION DE AVISO A, LA MENOS, UN RECEPTOR TERRESTRE (110, 116, 126), ALGUNOS DE LOS CUALES PUEDEN TRANSMITIR UNA SEÑAL DE CONFIRMACION (127) PARA QUE SE PUEDA COMPROBAR LA RECEPCION DEL MENSAJE Y CONTROLAR EL TRAFICO DEL SATELITE.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US45070789A | 1989-12-14 | 1989-12-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2108042T3 true ES2108042T3 (es) | 1997-12-16 |
Family
ID=23789184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES91902502T Expired - Lifetime ES2108042T3 (es) | 1989-12-14 | 1990-11-09 | Sistema de telemensajeria con acuse de recibo por satelite. |
Country Status (11)
Country | Link |
---|---|
US (2) | US5392451A (es) |
EP (1) | EP0505489B1 (es) |
JP (1) | JP2684119B2 (es) |
KR (1) | KR960001581B1 (es) |
AT (1) | ATE160068T1 (es) |
AU (1) | AU7170191A (es) |
CA (1) | CA2071490C (es) |
DE (1) | DE69031687T2 (es) |
DK (1) | DK0505489T3 (es) |
ES (1) | ES2108042T3 (es) |
WO (1) | WO1991009473A1 (es) |
Families Citing this family (87)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5303286A (en) * | 1991-03-29 | 1994-04-12 | Space Systems/Loral, Inc. | Wireless telephone/satellite roaming system |
AU630293B1 (en) * | 1991-04-29 | 1992-10-22 | Motorola, Inc. | Satellite based global paging system |
US5526404A (en) * | 1991-10-10 | 1996-06-11 | Space Systems/Loral, Inc. | Worldwide satellite telephone system and a network coordinating gateway for allocating satellite and terrestrial gateway resources |
CA2078932C (en) * | 1991-10-10 | 2003-12-02 | Robert A. Wiedeman | Satellite telecommunications system using network coordinating gateways operative with a terrestrial communication system |
US6144859A (en) * | 1993-08-27 | 2000-11-07 | Aeris Communications, Inc. | Wireless cellular communicator system and apparatus |
WO1994017641A1 (en) * | 1993-01-29 | 1994-08-04 | The Boeing Company | Call completion system and method |
US5422647A (en) * | 1993-05-07 | 1995-06-06 | Space Systems/Loral, Inc. | Mobile communication satellite payload |
US5594740A (en) | 1993-08-27 | 1997-01-14 | Axion Logistics Corporation | Wireless communications application specific enabling method and apparatus |
CA2130507A1 (en) * | 1993-11-19 | 1995-05-20 | Bernard M. Snyder | System and method for remotely tripping a switch |
US5588038A (en) * | 1993-11-19 | 1996-12-24 | J.F.A. Tech., Inc. | System and method for signaling a device at a remote location over a wireless network |
US5859874A (en) * | 1994-05-09 | 1999-01-12 | Globalstar L.P. | Multipath communication system optimizer |
US5579536A (en) * | 1994-06-13 | 1996-11-26 | Motorola, Inc. | Method and apparatus for establishing communication links between non-stationary communication units |
US5596333A (en) * | 1994-08-31 | 1997-01-21 | Motorola, Inc. | Method and apparatus for conveying a communication signal between a communication unit and a base site |
AU3682795A (en) * | 1994-09-12 | 1996-03-29 | Seiko Communications Systems, Inc. | Acknowledge back pager using secondary transmission source |
US5513241A (en) * | 1994-09-12 | 1996-04-30 | Seiko Communications Systems, Inc. | Low cost acknowledge-back system for a pager using existing infrastructure |
US5539921A (en) * | 1994-09-23 | 1996-07-23 | Motorola, Inc. | Apparatus for reducing ring-alert power and method therefor |
US5787336A (en) * | 1994-11-08 | 1998-07-28 | Space Systems/Loral, Inc. | Satellite communication power management system |
US5684859A (en) * | 1995-05-01 | 1997-11-04 | Motorola, Inc. | Method and apparatus for downloading location specific information to selective call receivers |
US6240124B1 (en) | 1995-06-06 | 2001-05-29 | Globalstar L.P. | Closed loop power control for low earth orbit satellite communications system |
US5634190A (en) * | 1995-06-06 | 1997-05-27 | Globalstar L.P. | Low earth orbit communication satellite gateway-to-gateway relay system |
US5592481A (en) * | 1995-06-06 | 1997-01-07 | Globalstar L.P. | Multiple satellite repeater capacity loading with multiple spread spectrum gateway antennas |
US5619525A (en) * | 1995-06-06 | 1997-04-08 | Globalstar L.P. | Closed loop power control for low earth orbit satellite communications system |
US5640386A (en) * | 1995-06-06 | 1997-06-17 | Globalstar L.P. | Two-system protocol conversion transceiver repeater |
RU2153226C2 (ru) * | 1995-06-06 | 2000-07-20 | Глоубалстар Л.П. | Система управления средствами разнесенной передачи сигналов через спутниковые ретрансляторы |
US5664006A (en) * | 1995-06-07 | 1997-09-02 | Globalstar L.P. | Method for accounting for user terminal connection to a satellite communications system |
US6272325B1 (en) | 1995-07-13 | 2001-08-07 | Globalstar L.P. | Method and apparatus for considering user terminal transmitted power during operation in a plurality of different communication systems |
US5802445A (en) * | 1995-07-13 | 1998-09-01 | Globalstar L.P. | Methods and apparatus for providing user RF exposure monitoring and control in a satellite communications system |
US5537683A (en) * | 1995-08-14 | 1996-07-16 | Motorola, Inc. | Radio paging system with antenna pattern exhibiting high diversity gain |
US5758260A (en) * | 1995-08-23 | 1998-05-26 | Globalstar L.P. | Satellite beam steering reference using terrestrial beam steering terminals |
US5831545A (en) * | 1995-08-25 | 1998-11-03 | Motorola, Inc. | Method and apparatus for adjusting a communication strategy in a radio communication system using location |
US5574975A (en) * | 1995-09-05 | 1996-11-12 | Motorola, Inc. | Paging method using power shifted transmitters |
US5920803A (en) * | 1995-09-05 | 1999-07-06 | Motorola, Inc. | Method and apparatus for message delivery in a communication system having orbiting transmitters |
US5721534A (en) * | 1995-11-02 | 1998-02-24 | Motorola, Inc. | Paging system with adaptive monitoring schedule and method of operation thereof |
US5812932A (en) * | 1995-11-17 | 1998-09-22 | Globalstar L.P. | Mobile satellite user information request system and methods |
US5892811A (en) * | 1995-12-04 | 1999-04-06 | Motorola, Inc. | Radio telecommunication network and method for unobtrusive call interception via transcoder bypass |
AU702270B2 (en) * | 1995-12-12 | 1999-02-18 | Aeris Communications, Inc. | Wireless application specific messaging and switching method |
US5999808A (en) * | 1995-12-12 | 1999-12-07 | Aeris Communications, Inc. | Wireless gaming method |
US5845203A (en) * | 1996-01-25 | 1998-12-01 | Aertis Cormmunications | Remote access application messaging wireless method |
US7035914B1 (en) | 1996-01-26 | 2006-04-25 | Simpleair Holdings, Inc. | System and method for transmission of data |
US6021433A (en) * | 1996-01-26 | 2000-02-01 | Wireless Internet, Inc. | System and method for transmission of data |
US5809090A (en) * | 1996-03-04 | 1998-09-15 | Glenayre Electronics, Inc. | Digital diversity receiver system |
US5918174A (en) * | 1996-03-29 | 1999-06-29 | Ericsson, Inc. | Circuitry and method for initiating communication between communication stations of a radio communication system |
US5835847A (en) * | 1996-04-02 | 1998-11-10 | Qualcomm Incorporated | Pilot signal strength control for a low earth orbiting satellite communications system |
US5930718A (en) * | 1996-05-07 | 1999-07-27 | Ericsson Inc. | Apparatus and method for transmitting and receiving a signaling message in a communication system |
US6072768A (en) * | 1996-09-04 | 2000-06-06 | Globalstar L.P. | Automatic satellite/terrestrial mobile terminal roaming system and method |
US6201961B1 (en) | 1996-09-13 | 2001-03-13 | Globalstar L. P. | Use of reference phone in point-to-point satellite communication system |
FI103546B1 (fi) * | 1996-09-16 | 1999-07-15 | Nokia Telecommunications Oy | Datapalvelu matkaviestinverkossa |
US5884170A (en) * | 1996-09-24 | 1999-03-16 | Ericsson, Inc. | Subscriber feature controlled high penetration messaging |
US6587687B1 (en) | 1996-10-21 | 2003-07-01 | Globalstar L.P. | Multiple satellite fade attenuation control system |
US6167426A (en) * | 1996-11-15 | 2000-12-26 | Wireless Internet, Inc. | Contact alerts for unconnected users |
GB2319696B (en) * | 1996-11-20 | 2001-08-01 | Internat Mobile Satellite Orga | Communication method and apparatus |
US5956619A (en) * | 1996-12-12 | 1999-09-21 | Globalstar L.P. | Satellite controlled power control for personal communication user terminals |
US5896558A (en) * | 1996-12-19 | 1999-04-20 | Globalstar L.P. | Interactive fixed and mobile satellite network |
US5995804A (en) * | 1997-01-16 | 1999-11-30 | Flash Comm. Inc. | Repeater station for augmenting the coverage area of a paging system |
US6060996A (en) * | 1997-02-05 | 2000-05-09 | Cue Network Corporation | Pager broadcast system |
US5875180A (en) * | 1997-02-06 | 1999-02-23 | Globalstar L.P. | Satellite telephone interference avoidance system |
US5918157A (en) * | 1997-03-18 | 1999-06-29 | Globalstar L.P. | Satellite communications system having distributed user assignment and resource assignment with terrestrial gateways |
US6128487A (en) * | 1997-04-15 | 2000-10-03 | Globalstar, L.P. | Global mobile paging system |
US5884142A (en) * | 1997-04-15 | 1999-03-16 | Globalstar L.P. | Low earth orbit distributed gateway communication system |
US6064857A (en) * | 1997-04-15 | 2000-05-16 | Globalstar L.P. | Dual mode satellite telephone with hybrid battery/capacitor power supply |
US5905943A (en) * | 1997-04-29 | 1999-05-18 | Globalstar L.P. | System for generating and using global radio frequency maps |
US5930681A (en) * | 1997-04-30 | 1999-07-27 | Motorola | Method and apparatus for conserving energy in a selective call receiver |
US6021309A (en) * | 1997-05-22 | 2000-02-01 | Globalstar L.P. | Channel frequency allocation for multiple-satellite communication network |
US7003304B1 (en) | 1997-09-19 | 2006-02-21 | Thompson Investment Group, Llc | Paging transceivers and methods for selectively retrieving messages |
US6636733B1 (en) | 1997-09-19 | 2003-10-21 | Thompson Trust | Wireless messaging method |
US6253061B1 (en) | 1997-09-19 | 2001-06-26 | Richard J. Helferich | Systems and methods for delivering information to a transmitting and receiving device |
US6826407B1 (en) | 1999-03-29 | 2004-11-30 | Richard J. Helferich | System and method for integrating audio and visual messaging |
US6101385A (en) * | 1997-10-09 | 2000-08-08 | Globalstar L.P. | Satellite communication service with non-congruent sub-beam coverage |
US6434384B1 (en) | 1997-10-17 | 2002-08-13 | The Boeing Company | Non-uniform multi-beam satellite communications system and method |
US6088589A (en) * | 1997-12-11 | 2000-07-11 | Ericsson Inc. | System, method and apparatus for handling high-power notification messages |
US6983138B1 (en) | 1997-12-12 | 2006-01-03 | Richard J. Helferich | User interface for message access |
US6418147B1 (en) * | 1998-01-21 | 2002-07-09 | Globalstar Lp | Multiple vocoder mobile satellite telephone system |
US6366195B1 (en) * | 1998-03-13 | 2002-04-02 | Wireless Online, Inc. | Power control in two-way paging systems |
WO1999052302A1 (en) * | 1998-04-02 | 1999-10-14 | Inmarsat Limited | Paging method and apparatus with acknowledgement capability |
US6661996B1 (en) | 1998-07-14 | 2003-12-09 | Globalstar L.P. | Satellite communication system providing multi-gateway diversity to a mobile user terminal |
US6314288B1 (en) * | 1998-12-16 | 2001-11-06 | Iridium Ip Llc | Error management in a messaging/telephony location interworking service |
US6424831B1 (en) * | 1999-03-30 | 2002-07-23 | Qualcomm, Inc. | Apparatus and method for paging a user terminal in a satellite communication system |
US6253080B1 (en) | 1999-07-08 | 2001-06-26 | Globalstar L.P. | Low earth orbit distributed gateway communication system |
US6463279B1 (en) | 1999-11-17 | 2002-10-08 | Globalstar L.P. | Channel frequency allocation for multiple-satellite communication network |
US7215648B2 (en) * | 2001-05-11 | 2007-05-08 | Varitek Industries, Inc. | Apparatus and method for efficient live webcasting and network connectivity |
AU2002319297A1 (en) * | 2002-04-09 | 2003-10-20 | Alcatel | System and method for real-time interconnection of elements of a wide area monitoring, measurement or data collection system through a direct digital satellite broadcasting multiplexing system |
DE10215567A1 (de) * | 2002-04-09 | 2003-10-23 | Siemens Ag | Verfahren zur Übertragung von Daten, insbesondere mit multimedialen Inhalten, in einem Mobilfunknetz |
US7529525B1 (en) | 2002-04-16 | 2009-05-05 | Faulkner Interstices Llc | Method and apparatus for collecting information for use in a smart antenna system |
US7346365B1 (en) * | 2002-04-16 | 2008-03-18 | Faulkner Interstices Llc | Smart antenna system and method |
US7065383B1 (en) * | 2002-04-16 | 2006-06-20 | Omri Hovers | Method and apparatus for synchronizing a smart antenna apparatus with a base station transceiver |
US7289826B1 (en) * | 2002-04-16 | 2007-10-30 | Faulkner Interstices, Llc | Method and apparatus for beam selection in a smart antenna system |
US12009903B2 (en) * | 2020-04-01 | 2024-06-11 | Carnegie Mellon University | Orbital edge computing |
Family Cites Families (31)
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---|---|---|---|---|
US3497807A (en) * | 1966-08-31 | 1970-02-24 | Us Navy | Multipurpose satellite system |
US4018993A (en) * | 1974-04-19 | 1977-04-19 | Telefonaktiebolaget L M Ericsson | Telephone system comprising a satellite |
SE377016B (es) * | 1974-04-19 | 1975-06-16 | Ericsson Telefon Ab L M | |
US4105973A (en) * | 1976-10-15 | 1978-08-08 | Bell Telephone Laboratories, Incorporated | Multibeam, digitally modulated, time division, switched satellite communications system |
US4145658A (en) * | 1977-06-03 | 1979-03-20 | Bell Telephone Laboratories, Incorporated | Method and apparatus for cancelling interference between area coverage and spot coverage antenna beams |
US4261054A (en) * | 1977-12-15 | 1981-04-07 | Harris Corporation | Real-time adaptive power control in satellite communications systems |
US4178476A (en) * | 1978-05-26 | 1979-12-11 | Frost Edward G | Automatic nationwide paging system |
US4268831A (en) * | 1979-04-30 | 1981-05-19 | Sperry Corporation | Antenna for scanning a limited spatial sector |
US4381562A (en) * | 1980-05-01 | 1983-04-26 | Bell Telephone Laboratories, Incorporated | Broadcast type satellite communication systems |
EP0079612B1 (en) * | 1981-11-16 | 1986-10-08 | Nec Corporation | Earth station transmission power control system |
US4870422A (en) * | 1982-03-01 | 1989-09-26 | Western Atlas International, Inc. | Method and system for determining position from signals from satellites |
US4916539A (en) * | 1983-04-21 | 1990-04-10 | The Weather Channel, Inc. | Communications system having receivers which can be addressed in selected classes |
US4644347A (en) * | 1983-08-10 | 1987-02-17 | Motorola, Inc. | Multiple frequency message system |
EP0137865A1 (de) * | 1983-10-15 | 1985-04-24 | ANT Nachrichtentechnik GmbH | Verfahren zum Aufbau einer Funkverbindung |
DE3471568D1 (en) * | 1983-12-08 | 1988-06-30 | Ant Nachrichtentech | Method and system for establishing a telephone connection with a mobile suscriber |
US4689625A (en) * | 1984-11-06 | 1987-08-25 | Martin Marietta Corporation | Satellite communications system and method therefor |
FR2578703B1 (fr) * | 1985-03-05 | 1987-06-26 | Europ Agence Spatiale | Procede de transmission de donnees autoadaptatif et hybride, notamment pour la telecommunication spatiale |
US4718661A (en) * | 1985-04-15 | 1988-01-12 | Wolfe Henry S | Apparatus for playing a game in water and separable and re-attachable tail member |
IT1182741B (it) * | 1985-06-06 | 1987-10-05 | Selenia Spazio Spa | Perfezionamento nei sistemi di telecomunicazioni via satellite utilizzanti la tecnica ss-tdna |
BR8606818A (pt) * | 1985-08-08 | 1987-10-13 | Network Satellite Paging | Sistema de paginacao de radio e sistema de paginacao de area ampla |
US4718109A (en) * | 1986-03-06 | 1988-01-05 | Motorola, Inc. | Automatic synchronization system |
US4876737A (en) * | 1986-11-26 | 1989-10-24 | Microdyne Corporation | Satellite data transmission and receiving station |
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JPS6471329A (en) * | 1987-09-11 | 1989-03-16 | Nec Corp | Mobile body satellite communication system |
US4849750A (en) * | 1987-10-20 | 1989-07-18 | Telefind Corp. | Paging receiver with dynamically programmable channel frequencies and functionality |
US4825193A (en) * | 1988-01-07 | 1989-04-25 | Motorola, Inc. | Acknowledge back pager with adaptive variable transmitter output power |
US4891637A (en) * | 1988-01-07 | 1990-01-02 | Motorola, Inc. | Acknowledge back pager with apparatus for controlling transmit frequency |
US5003534A (en) * | 1988-08-26 | 1991-03-26 | Scientific Atlanta | Link utilization control mechanism for demand assignment satellite communications network |
US5008952A (en) * | 1989-11-03 | 1991-04-16 | Motorola, Inc. | Global satellite communication system with geographic protocol conversion |
US5010317A (en) * | 1989-11-30 | 1991-04-23 | Motorola, Inc. | Satellite based simulcast paging system |
US5239670A (en) * | 1989-11-30 | 1993-08-24 | Motorola, Inc. | Satellite based global paging system |
-
1990
- 1990-11-09 AU AU71701/91A patent/AU7170191A/en not_active Abandoned
- 1990-11-09 KR KR1019920701390A patent/KR960001581B1/ko not_active IP Right Cessation
- 1990-11-09 EP EP91902502A patent/EP0505489B1/en not_active Expired - Lifetime
- 1990-11-09 DE DE69031687T patent/DE69031687T2/de not_active Expired - Fee Related
- 1990-11-09 JP JP3502652A patent/JP2684119B2/ja not_active Expired - Lifetime
- 1990-11-09 CA CA002071490A patent/CA2071490C/en not_active Expired - Fee Related
- 1990-11-09 AT AT91902502T patent/ATE160068T1/de not_active IP Right Cessation
- 1990-11-09 DK DK91902502T patent/DK0505489T3/da active
- 1990-11-09 ES ES91902502T patent/ES2108042T3/es not_active Expired - Lifetime
- 1990-11-09 WO PCT/US1990/006477 patent/WO1991009473A1/en active IP Right Grant
-
1993
- 1993-06-17 US US08/077,257 patent/US5392451A/en not_active Expired - Lifetime
- 1993-12-02 US US08/160,315 patent/US5404569A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69031687T2 (de) | 1998-04-02 |
EP0505489B1 (en) | 1997-11-05 |
EP0505489A1 (en) | 1992-09-30 |
KR920704455A (ko) | 1992-12-19 |
CA2071490C (en) | 1996-01-30 |
WO1991009473A1 (en) | 1991-06-27 |
DK0505489T3 (da) | 1998-07-27 |
AU7170191A (en) | 1991-07-18 |
US5392451A (en) | 1995-02-21 |
CA2071490A1 (en) | 1991-06-15 |
EP0505489A4 (en) | 1993-10-13 |
ATE160068T1 (de) | 1997-11-15 |
JPH05502352A (ja) | 1993-04-22 |
DE69031687D1 (de) | 1997-12-11 |
KR960001581B1 (ko) | 1996-02-02 |
JP2684119B2 (ja) | 1997-12-03 |
US5404569A (en) | 1995-04-04 |
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