WO1990013213A1 - Dispositifs d'appel radioelectrique - Google Patents

Dispositifs d'appel radioelectrique Download PDF

Info

Publication number
WO1990013213A1
WO1990013213A1 PCT/GB1990/000588 GB9000588W WO9013213A1 WO 1990013213 A1 WO1990013213 A1 WO 1990013213A1 GB 9000588 W GB9000588 W GB 9000588W WO 9013213 A1 WO9013213 A1 WO 9013213A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio pager
portable computer
data
radio
pager
Prior art date
Application number
PCT/GB1990/000588
Other languages
English (en)
Inventor
Michael George Gloster
Nicholas Simon. MYERS
Original Assignee
Blick Communications Limited
Psion Plc
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
Application filed by Blick Communications Limited, Psion Plc filed Critical Blick Communications Limited
Publication of WO1990013213A1 publication Critical patent/WO1990013213A1/fr

Links

Classifications

    • 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
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008—Personal calling arrangements or devices, i.e. paging systems
    • G08B3/1016—Personal calling arrangements or devices, i.e. paging systems using wireless transmission
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008—Personal calling arrangements or devices, i.e. paging systems
    • G08B3/1016—Personal calling arrangements or devices, i.e. paging systems using wireless transmission
    • G08B3/1025—Paging receivers with audible signalling details
    • G08B3/1066—Paging receivers with audible signalling details with other provisions not elsewhere provided for, e.g. turn-off protection
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/222—Personal calling arrangements or devices, i.e. paging systems
    • G08B5/223—Personal calling arrangements or devices, i.e. paging systems using wireless transmission
    • G08B5/224—Paging receivers with visible signalling details
    • G08B5/228—Paging receivers with visible signalling details combined with other devices having a different main function, e.g. watches

Definitions

  • This invention relates to radio pagers for use in conjunction with radio paging networks.
  • a radio pager for use on a radio paging network, the radio pager comprising: a receiver for receiving the information transmitted via the network; comparison means for comparing an address signal contained within the transmitted information with an address code(s) stored within the radio pager which identifies the radio pager; a processor means for processing the data when the address signal corresponds to the address code(s), for manipulating data contained within the transmitted information, and for responding to the data in dependence upon whether part or all of the data satisfies a desired condition; and an interface connector for enabling detachable connection of the processor to a portable computer.
  • processor means carries out an operational function on the received data.
  • Embodiments of the invention have the advantage that they are able flexibly to manipulate and process information received, before the information is displayed. Conventional radio pagers do not have this capability. Embodiments of the invention can therefore perform a range of additional tasks not available to conventional radio pagers.
  • a programme when the received data satisfies the desired condition, a programme may be caused to run. Running of the programme can facilitate manipulation of the data, the manipulative function being determined by the form of the programme.
  • the programme may be stored in the processor.
  • the portable computer is operative for receiving the data from the processor and for generating instruction signals for instructing the processor to respond in a predetermined manner when par or all of the data satisfies the desired condition. That is to say, the portable computer may conduct a manipulative function on the data either alone or in addition with the processor.
  • the portable computer is preferably programmable thereby enabling variation of the desired condition which must be met before .
  • the data is manipulated and the processor carries out the response, and/or enabling variation of the manipulated function carried out on the data, and/or variation of the nature of the response made by the processor.
  • the characteristics of the "desired condition", the processing and manipulative function, and the response are contained or defined in the programming software.
  • communications between the radio pager and the portable computer are synchronised with transmissions received by the radio pager. That is to say, the radio pager is operative for switching off or for reducing the activity of the portable computer during receipt of transmissions and for switching the portable computer on again when there are no transmissions received by the radio pager.
  • the purpose of this is to eliminate or at least reduce the risk of interference occurring between the portable computer and the radio pager.
  • a radio pager which has an internal aerial for receiving transmissions is connected to or placed near computer based equipment, its performance may be severely impaired by the radio frequency emissions from the computing equipment.
  • a pocket radio pager employs battery economising techniques which cause the radio pager to be turned off during periods where transmission has no relevance to that pager (ie. during periods where address or message code words are intended for other pagers).
  • the portable computer is preferably arranged to operate during these periods.
  • the transfer of data between the radio pager and the portable computer is also effected during the periods that the radio receiver of the pager is turned off (ie. not receiving transmitted information).
  • a visual display may be provided on the radio pager and/or the portable computer for displaying data received and processed by the radio pager.
  • the radio t pager may be provided with a memory for storing data contained in the transmitted information when the address signal corresponds to the address code.
  • the processor of the radio pager and the portable computer may be programmed so that the desired condition is recognised to occur when data received by the radio pager has a predetermined relationship (such as form and sequence) with information stored in the memory of the radio pager or a memory within the portable computer, the portable computer being operative for, for example: maintaining (in the memory of the radio pager or memory of the personal computer) independent databases for storing messages; selectively searching, deleting, saving and displaying data stored in the databases; or updating the information stored in the memory by the received data.
  • a predetermined relationship such as form and sequence
  • the "desired condition" may be for example, data relating to a particular subject, eg. stock market information. Receipt of this information is recognised by the radio pager or portable computer and initiates running of a sub-programme stored in the pager or computer.
  • the sub-programme can be such as to update, for example, stock market prices which are already stored in a memory of the radio pager or portable computer.
  • the operational function or manipulation is the act of updating the stock market prices in the memory.
  • the programming of the processor and/or portable computer may be such that the radio pager is capable of responding to received data in other ways: A) by identifying a particular form of received data as relating to an appointment date and time, and in response to the identification, entering the appointment time and date into an electronic diary contained within the radio pager or portable computer;
  • the radio pager may comprise software store means for storing programming software which can be transmitted or "loaded down" to the portable computer when the radio pager is connected thereto via the interface.
  • the programming software may be such as to set up or programme the portable computer so that it is capable of receiving data from the processor of the radio pager.
  • the software may be such as to enable the portable computer to generate appropriate instruction signals, thereby enabling the processor to respond in an appropriate manner when the received data satisfies the desired condition.
  • the portable computer may also comprise computation means and an alpha-numeric keyboard for performing mathematical computational functions.
  • An indicator means (for example a bleeper) may be provided within the radio pager or portable computer for indicating to the user receipt of data which satisfies the desired condition or one of several possible desired conditions.
  • the processor of the radio pager or the portable computer may be operative for running sub-programmes in response to one or more particular identification codes (or Radio Identity Codes RIC).
  • the sub-programme may relate to a specialist operation such as the presentation of specialist information (ie. stock market share prices) transmitted from a radio paging transmitter network.
  • the radio pager or portable computer may comprise a further sub-programme which is run when the radio pager receives a corresponding identification code in the received signal.
  • This further sub-programme may be operative for changing or deleting one or more of the identification codes or Radio Identity Codes stored in the pager. It is therefore possible to enable or disable one or more pagers in a group of pagers from receiving particular specialist information.
  • This may be applied in the case where, for example, it is desired to control the pagers which can receive say share prices of the top thirty shares in the stock market. Receipt of this information would be recognised by the radio pager upon receipt of one of the identification codes. This would set up the sub-programme which would run therefore enabling the radio pager and portable computer to respond to this information and update share prices stored in the memory of the radio pager or personal computer and display the new share prices accordingly. If it were desired that a given radio pager should no longer receive this particular information (for example, for security reasons or because the owner of the pager has not paid his bill) the transmitting party would be able to instruct that pager to set up the further sub-programme upon receipt of another identification code.
  • This further sub-programme would be operative for changing or erasing the identification code corresponding to the stock market service from the pager. Once this is done, the radio pager could no longer receive stock market information until the further sub-programme is run again and instructed by the information received by the radio pager to reinstate the identification code corresponding to the stock market information.
  • This identification code may be a Radio Identity Code but may alternatively be a specific form and sequence of data (for example "A;") which is held in a table within the memory of the pager.
  • a group of radio pagers may be capable for running sub-programmes in response to receipt a of predetermined identification code, or RIC or, for example a sequence or data such as "A;", which sub-programmes (when run) would validate or invalidate credit card numbers held within the memory of the radio pager or portable computer.
  • the appropriate identification code could be transmitted to specified radio pagers so as to run the sub-programme whereupon the credit card could be validated or invalidated according to the form of the data received by the radio pager.
  • Embodiments of the invention have the advantage that they are capable of acting upon information received to perform a pre-programmed data manipulating function thereby providing a radio pager having a considerable degree of flexibility.
  • a radio pager 1 comprises an aerial 2 connected to a radio receiver 3 for receiving information transmitted by a radio paging transmitter network 4.
  • the network 4 receives information from a radio paging input infrastructure 5, the network 4 and infrastructure 5 operating according to principles known in the art.
  • the radio information is transmitted by an aerial 6 and may use one of many standard radio paging coding formats, for example, CCIR radio paging code number 1 transmitted at 512 or 1200 baud.
  • the transmissions may occur with a frequency band of, for example, 130 to 150 MHz.
  • the radio pager 1 includes a radio paging address decoder 7 for decoding radio paging signals received by the radio receiver 3 and for comparing an address signal contained in the received radio paging information with an address code (ie. identification code) which identifies the radio pager 1.
  • the address code is stored in an address non-volatile memory 8 of the radio pager 1.
  • the radio paging address decoder 7 activates the radio pager 1 so that the transmitted data can be received by a microcomputer 9.
  • the microcomputer 9 can communicate with a portable computer 10 which is detachably connected to an interface connector 11 of the radio pager 1.
  • the radio pager 1 is provided with a down-loadable software PROM.12 which is operative for programming the portable computer 10 when the interface connector 11 is connected to the portable computer.
  • the portable computer 10 may be, for example, a "Psion Organiser II" (trade mark of Psion PLC).
  • the radio pager is plugged into the "top slot" facility of the Organiser II.
  • the portable computer 10 is provided with a display 13 for displaying data received by the radio pager 1.
  • the portable computer 10 is operative for performing the mathematical, and other data manipulative functions of a conventional electronic computer.
  • the portable computer 10 is provided with an alpha-numeric keyboard.
  • the portable computer 10 is capable of performing the following functions:
  • the radio pager 1 is provided with control lines 4 for transmitting information relating to their status (ie. whether transmissions are being received) of the radio receiver. This information is transmitted to the microcomputer 9 which is operative for controlling activation of the portable computer 10 in such a manner that the portable computer 10 is activated when the radio receiver 3 is not receiving transmissions from the transmitter network 4.

Abstract

Un dispositif d'appel radioélectrique (1) comprend une antenne (2) reliée à un récepteur radio (3) qui reçoit l'information transmise par un réseau d'appel radioélectrique (4). On peut envoyer l'information reçue par ledit dispositif d'appel (1) à un micro-ordinateur (9) relié à un ordinateur portatif (10). Le micro-ordinateur (9) et l'ordinateur portatif (10) traitent l'information reçue par le dispositif d'appel (1) et manipulent les données comprises dans l'information transmise. Suivant qu'une partie ou la totalité des données satisfait une condition spécifique le micro-ordinateur et l'ordinateur portatif réagissent en conséquence auxdites données.
PCT/GB1990/000588 1989-04-14 1990-04-17 Dispositifs d'appel radioelectrique WO1990013213A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8908513.8 1989-04-14
GB898908513A GB8908513D0 (en) 1989-04-14 1989-04-14 Radio pagers

Publications (1)

Publication Number Publication Date
WO1990013213A1 true WO1990013213A1 (fr) 1990-11-01

Family

ID=10655069

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/000588 WO1990013213A1 (fr) 1989-04-14 1990-04-17 Dispositifs d'appel radioelectrique

Country Status (2)

Country Link
GB (2) GB8908513D0 (fr)
WO (1) WO1990013213A1 (fr)

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0434231A2 (fr) * 1989-12-18 1991-06-26 Hewlett-Packard Company Accessoire d'appel de personnes pour dispositifs de calcul portatifs
EP0498660A1 (fr) * 1991-02-08 1992-08-12 Nec Corporation Récepteur d'appel de personnes avec fonction d'affichage de message
EP0506335A1 (fr) * 1991-03-25 1992-09-30 Seiko Epson Corporation Clavier pour un appareil d'information électronique
EP0519838A1 (fr) * 1991-06-21 1992-12-23 Jacques Lewiner Perfectionnements aux installations pour mettre à jour à distance les agendas de poche électroniques
EP0529798A1 (fr) * 1991-07-22 1993-03-03 Mitsubishi Denki Kabushiki Kaisha Dispositif sans fil
EP0573097A1 (fr) * 1992-06-05 1993-12-08 Philips Electronics Uk Limited Emission de données par radio
EP0580116A2 (fr) * 1992-07-20 1994-01-26 Casio Computer Company Limited Dispositif de gestion d'information
EP0583064A1 (fr) * 1992-07-09 1994-02-16 Nec Corporation Récepteur d'appel radio avec unité d'affichage
EP0593277A1 (fr) * 1992-10-13 1994-04-20 Nec Corporation Récepteur d'appel radio
WO1994012938A1 (fr) * 1992-12-02 1994-06-09 Compaq Computer Corporation Ordinateur portatif a synchronisation automatique de donnees avec l'ordinateur central
US5337044A (en) * 1991-10-08 1994-08-09 Nomadic Systems, Inc. System for remote computer control using message broadcasting system
WO1994021051A1 (fr) * 1993-03-10 1994-09-15 Awacs Communications (Nz) Limited Reseau perfectionne de transmission radioelectrique unidirectionnelle de donnees a sept bits
FR2705010A1 (fr) * 1993-05-04 1994-11-10 I T Com Récepteur portatif de radiomessagerie et ensemble récepteur de radio-messagerie/unité de traitement informatique.
US5390324A (en) * 1992-10-02 1995-02-14 Compaq Computer Corporation Computer failure recovery and alert system
EP0653126A1 (fr) * 1992-07-31 1995-05-17 Motorola, Inc. Procede et appareil pour charger un logiciel depuis un modem radioelectrique dans un ordinateur exterieur
EP0660281A1 (fr) * 1993-12-24 1995-06-28 Nec Corporation Dispositif de communication radio combinable avec un modem radio pour ordinateur
WO1995019593A1 (fr) * 1994-01-14 1995-07-20 Michael Jeremy Kew Systeme de securite pour ordinateur
US5436621A (en) * 1993-07-02 1995-07-25 Motorola, Inc. Messaging peripheral with secure message data function
EP0667599A1 (fr) * 1994-01-31 1995-08-16 Nec Corporation Récepteur d'appel sélectif pour dispositifs informatiques
WO1995018491A3 (fr) * 1993-12-29 1995-08-17 Novalink Technologies, Inc. Dispositif de transmission de donnees
EP0669072A1 (fr) * 1992-10-19 1995-08-30 Motorola, Inc. Recepteur d'appels selectifs a notification de messages par interface informatique
FR2719960A1 (fr) * 1994-05-16 1995-11-17 Nouveau Guy Alain Le Module additionnel d'émission radio pour récepteur de radiomessagerie permettant l'émission d'accusé de réception et de messages.
US5495234A (en) * 1993-01-21 1996-02-27 Motorola, Inc. Method and apparatus for length dependent selective call message handling
US5528667A (en) * 1992-10-13 1996-06-18 U.S. Philips Corporation Time management for cordless telephone by inputs from a user through the keypad to cause data to be transferred to the external source via input terminals and mating terminals on a battery charger
GB2300288A (en) * 1994-01-14 1996-10-30 Michael Jeremy Kew A computer security system
WO1997019395A2 (fr) * 1995-11-20 1997-05-29 Philips Electronics N.V. Systeme de distribution de programmes d'ordinateur
GB2312306A (en) * 1996-04-17 1997-10-22 Simon Andrew Quinn Jacobs Remote control of electrical devices
EP0684742A3 (fr) * 1994-05-24 1998-11-04 Nec Corporation Récepteur d'appel sélectif
EP0893892A2 (fr) * 1997-07-23 1999-01-27 SANYO ELECTRIC Co., Ltd. Récepteur pour la réception de données radiodiffusées
US5877699A (en) * 1992-06-05 1999-03-02 U.S. Philips Corporation Displaying data transmitted by radio
WO1999035557A2 (fr) * 1998-01-07 1999-07-15 Microsoft Corporation Systeme et procede permettant de recevoir des informations radio sur un dispositif mobile
EP0963125A2 (fr) * 1998-06-01 1999-12-08 Motorola, Inc. Unité d'abonné et méthode de mise à jour d'une valeur de fonction
EP0973350A2 (fr) * 1998-07-17 2000-01-19 Phone.Com Inc. Méthode et appareil permettant contrôle d'accès à services locales d'appareils mobiles
EP1024645A2 (fr) * 1999-01-28 2000-08-02 Siemens Information and Communication Products, L.L.C. Méthode et appareil d'extension des capacités d'un téléphone
US6289464B1 (en) * 1998-01-07 2001-09-11 Microsoft Corporation Receiving wireless information on a mobile device with reduced power consumption
US6348855B1 (en) 1996-09-19 2002-02-19 Nec Corporation Wireless selective call receiver
US6449638B1 (en) 1998-01-07 2002-09-10 Microsoft Corporation Channel definition architecture extension
US6507874B1 (en) 1998-01-07 2003-01-14 Microsoft Corporation System for efficient routing and translation of data
US7426264B1 (en) * 1994-01-05 2008-09-16 Henderson Daniel A Method and apparatus for improved personal communication devices and systems

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Cited By (68)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0434231A2 (fr) * 1989-12-18 1991-06-26 Hewlett-Packard Company Accessoire d'appel de personnes pour dispositifs de calcul portatifs
EP0434231A3 (en) * 1989-12-18 1992-05-13 Hewlett-Packard Company Paging accessory for portable computing devices
EP0498660A1 (fr) * 1991-02-08 1992-08-12 Nec Corporation Récepteur d'appel de personnes avec fonction d'affichage de message
EP0506335A1 (fr) * 1991-03-25 1992-09-30 Seiko Epson Corporation Clavier pour un appareil d'information électronique
US5956017A (en) * 1991-03-25 1999-09-21 Seiko Epson Corporation Electronic information apparatus
EP0519838A1 (fr) * 1991-06-21 1992-12-23 Jacques Lewiner Perfectionnements aux installations pour mettre à jour à distance les agendas de poche électroniques
FR2678086A1 (fr) * 1991-06-21 1992-12-24 Lewiner Jacques Perfectionnements aux agendas de poche electroniques et a leurs moyens de mise a jour.
EP0529798A1 (fr) * 1991-07-22 1993-03-03 Mitsubishi Denki Kabushiki Kaisha Dispositif sans fil
US5396650A (en) * 1991-07-22 1995-03-07 Mitsubishi Denki Kabushiki Kaisha Wireless communication device with multi-function integrated circuit processing card
US5337044A (en) * 1991-10-08 1994-08-09 Nomadic Systems, Inc. System for remote computer control using message broadcasting system
EP0573097A1 (fr) * 1992-06-05 1993-12-08 Philips Electronics Uk Limited Emission de données par radio
US5877699A (en) * 1992-06-05 1999-03-02 U.S. Philips Corporation Displaying data transmitted by radio
EP0583064A1 (fr) * 1992-07-09 1994-02-16 Nec Corporation Récepteur d'appel radio avec unité d'affichage
EP0580116A2 (fr) * 1992-07-20 1994-01-26 Casio Computer Company Limited Dispositif de gestion d'information
US5606712A (en) * 1992-07-20 1997-02-25 Casio Computer Co., Ltd. Information managing apparatus capable of utilizing related information in different function modes
EP0580116A3 (en) * 1992-07-20 1994-05-11 Casio Computer Co Ltd Information managing apparatus
CN1037034C (zh) * 1992-07-20 1998-01-14 卡西欧计算机公司 信息管理装置
EP0653126A1 (fr) * 1992-07-31 1995-05-17 Motorola, Inc. Procede et appareil pour charger un logiciel depuis un modem radioelectrique dans un ordinateur exterieur
EP0653126A4 (fr) * 1992-07-31 1997-08-27 Motorola Inc Procede et appareil pour charger un logiciel depuis un modem radioelectrique dans un ordinateur exterieur.
US5390324A (en) * 1992-10-02 1995-02-14 Compaq Computer Corporation Computer failure recovery and alert system
US5956475A (en) * 1992-10-02 1999-09-21 Compaq Computer Corporation Computer failure recovery and alert system
US6101617A (en) * 1992-10-02 2000-08-08 Compaq Computer Corporation Computer failure recovery and alert system
US5596711A (en) * 1992-10-02 1997-01-21 Compaq Computer Corporation Computer failure recovery and alert system
US5528667A (en) * 1992-10-13 1996-06-18 U.S. Philips Corporation Time management for cordless telephone by inputs from a user through the keypad to cause data to be transferred to the external source via input terminals and mating terminals on a battery charger
EP0593277A1 (fr) * 1992-10-13 1994-04-20 Nec Corporation Récepteur d'appel radio
EP0669072A1 (fr) * 1992-10-19 1995-08-30 Motorola, Inc. Recepteur d'appels selectifs a notification de messages par interface informatique
EP0669072A4 (fr) * 1992-10-19 1995-10-11
US5666530A (en) * 1992-12-02 1997-09-09 Compaq Computer Corporation System for automatic synchronization of common file between portable computer and host computer via communication channel selected from a plurality of usable channels there between
US5928329A (en) * 1992-12-02 1999-07-27 Compaq Computer Corporation System for automatic synchronization of common file between portable computer and host computer via communication channel selected from a plurality of usable channels therebetween
US6317797B2 (en) 1992-12-02 2001-11-13 Compaq Computer Corporation System for automatic synchronization of common file between portable computer and host computer via communication channel established with user approval of charge to be incurred
WO1994012938A1 (fr) * 1992-12-02 1994-06-09 Compaq Computer Corporation Ordinateur portatif a synchronisation automatique de donnees avec l'ordinateur central
US5495234A (en) * 1993-01-21 1996-02-27 Motorola, Inc. Method and apparatus for length dependent selective call message handling
WO1994021051A1 (fr) * 1993-03-10 1994-09-15 Awacs Communications (Nz) Limited Reseau perfectionne de transmission radioelectrique unidirectionnelle de donnees a sept bits
FR2705010A1 (fr) * 1993-05-04 1994-11-10 I T Com Récepteur portatif de radiomessagerie et ensemble récepteur de radio-messagerie/unité de traitement informatique.
US5436621A (en) * 1993-07-02 1995-07-25 Motorola, Inc. Messaging peripheral with secure message data function
US5799240A (en) * 1993-12-24 1998-08-25 Nec Corporation Radio communication device combinable with a radio modem for computer
EP0660281A1 (fr) * 1993-12-24 1995-06-28 Nec Corporation Dispositif de communication radio combinable avec un modem radio pour ordinateur
WO1995018491A3 (fr) * 1993-12-29 1995-08-17 Novalink Technologies, Inc. Dispositif de transmission de donnees
US5822692A (en) * 1993-12-29 1998-10-13 Flat Connections, Inc. Data communication device
US7426264B1 (en) * 1994-01-05 2008-09-16 Henderson Daniel A Method and apparatus for improved personal communication devices and systems
WO1995019593A1 (fr) * 1994-01-14 1995-07-20 Michael Jeremy Kew Systeme de securite pour ordinateur
GB2300288A (en) * 1994-01-14 1996-10-30 Michael Jeremy Kew A computer security system
US5673032A (en) * 1994-01-31 1997-09-30 Nec Corporation Selective calling receiver for computing devices
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Also Published As

Publication number Publication date
GB2247810A (en) 1992-03-11
GB2247810B (en) 1993-12-22
GB8908513D0 (en) 1989-06-01
GB9120275D0 (en) 1991-11-27

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