| Patents for G08B 3 - Audible signalling systems; Audible personal calling systems (6,083) |
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| 10/11/1990 | DE3910851A1 Chime circuit |
| 10/09/1990 | US4962545 Volume level retention in a pager |
| 10/09/1990 | US4962528 For portable paging devices |
| 10/09/1990 | US4962377 Paging by text matching |
| 10/04/1990 | WO1990011654A1 Paging terminal apparatus with user selectable page forwarding capability and methodology therefor |
| 10/04/1990 | WO1990011585A1 Emergency vehicle audible warning system and method |
| 09/26/1990 | CN2062924U Human body in duction device for alarm |
| 09/26/1990 | CN2062876U Miniature 5 w alarm module |
| 09/20/1990 | WO1990010987A2 Energy saving protocol for a communication system |
| 09/20/1990 | WO1990010904A1 Method and system for user controlled page disposition |
| 09/19/1990 | EP0387281A1 Paging receiver with programmable areas of reception |
| 09/19/1990 | CN2062526U Electronic timed calling device |
| 09/19/1990 | CN2062408U Shortsightedness prevention desk lamp |
| 09/18/1990 | US4958154 System for wireless remote actuation of differing siren programs |
| 09/12/1990 | EP0386411A1 Paging by text matching |
| 09/12/1990 | CN2062080U Multi-function protecting controller for domestic electric appliances |
| 09/07/1990 | WO1990010359A1 Pager having alert mode change due to user non-response |
| 09/05/1990 | CN2061713U Multifunctional domestic protector |
| 09/05/1990 | CN2061712U Theft-proof alarm with single key variable electronic code for bedroom |
| 09/04/1990 | US4955080 Selectively called receiver |
| 09/04/1990 | US4954805 Piezo electronic horn |
| 08/29/1990 | CN2061306U 超级电子卡 Ultra Electronics Card |
| 08/28/1990 | US4952929 Selective call receiving system |
| 08/22/1990 | CN2060908U Health care box with autoalare function |
| 08/21/1990 | US4951044 Paging terminal apparatus with user selectable page forwarding capability and methodology therefor |
| 08/21/1990 | US4951043 Pager receiver helpful for effective use of call numbers |
| 08/21/1990 | US4950107 Audible alarm device for divers |
| 08/14/1990 | US4949085 Prioritization of stored messages in a digital voice paging receiver |
| 08/14/1990 | US4949068 Motorcycle sound simulator for a child's toy |
| 08/09/1990 | WO1990009082A1 A programmable multi-address pager receiver and method of characterizing same |
| 08/01/1990 | EP0380075A1 Radio automatic alarm transfer system |
| 07/31/1990 | US4945346 Audible circuit tracer |
| 07/31/1990 | US4945334 Energizing means for electronic warning apparatus |
| 07/26/1990 | WO1990008446A1 Paging system with multiple frequencies and multiple protocols |
| 07/24/1990 | US4943803 Paging system with paging receivers controlled depending on location |
| 07/18/1990 | EP0377581A1 Analog/digital data storage system. |
| 07/11/1990 | CN2059239U Multi-functional electronic clamp |
| 07/10/1990 | US4940975 Radio pager receiver capable of readily checking whether or not memory backup is correct |
| 07/04/1990 | EP0210213B1 Radio pager with error detection |
| 07/04/1990 | CN2058833U Emergency first-aid box with alarming |
| 06/27/1990 | CN2058774U Electrical controller of multifunctional sound-controlled cradle |
| 06/19/1990 | US4935909 Piezoelectric signaling device |
| 06/19/1990 | US4935735 Selective call radio receiver silent alert mode entry system |
| 06/19/1990 | US4935732 Paging receiver with programmable areas of reception |
| 06/19/1990 | CA1270528A1 Paging receiver with lpc speech synthesizer |
| 06/13/1990 | EP0372640A1 Personal paging system with determination of the status of a paging unit and of a user thereof |
| 06/13/1990 | EP0372633A1 Personal paging system with call-back identification |
| 06/13/1990 | EP0372006A1 Improved paging device |
| 06/06/1990 | CN2058025U Electromagnetic remote controlled alarm for loss and anti-theft |
| 06/05/1990 | US4931765 Unitized housing for silent and tone pager alerting system |
| 05/29/1990 | US4929924 Electronic alarm horn |
| 05/22/1990 | US4928086 Pager receiver having a common timer circuit for both sequential lock-out and out-of-range |
| 05/15/1990 | US4926159 Apparatus and method for the generation of directionally perceptible sound |
| 05/09/1990 | CN2056906U Electronic controller for electric trumpet of car |
| 04/18/1990 | EP0363555A2 Bed-operating apparatus |
| 04/17/1990 | US4918438 Paging receiver having audible and vibrator annunciating means |
| 04/12/1990 | DE3833852A1 Upgrading unit for electrical signalling apparatuses |
| 04/11/1990 | CN2055959U Sound seismic alarm |
| 04/11/1990 | CN2055723U Medical box with automatic alarm |
| 04/04/1990 | EP0360830A1 Improved pager based information system. |
| 04/03/1990 | US4914705 Voice message announcing method and system for plant |
| 03/28/1990 | EP0360216A2 Selective paging system and paging receiver therefor |
| 03/20/1990 | US4910511 Radio pager having local- and wide-area reception modes |
| 03/20/1990 | US4910510 System for off-the-air reprogramming of communication receivers |
| 03/20/1990 | CA1266886A1 Control interface for combined watch and pager functions |
| 03/14/1990 | CN2054312U 报警急救药盒 First aid kit alarm |
| 03/13/1990 | US4908732 Electronic siren interrupt system |
| 03/13/1990 | US4908601 Loud speaker with horizontal radiation pattern |
| 03/13/1990 | US4908600 Narrow band synchronized radio communication and alarm system |
| 03/13/1990 | US4908523 Electronic circuit with power drain control |
| 03/13/1990 | US4908484 Doorbell activating device for pets |
| 02/27/1990 | US4905003 Analog/digital data storage system |
| 02/22/1990 | DE3925180A1 Fire-extinguishing system - uses carbon-di:oxide extinguishers and gives people adequate advanced warning that extinguishers are about to trigger |
| 02/14/1990 | CN2052921U Anti-theft safety device |
| 02/07/1990 | EP0353438A1 In motion setting device for radio controlled sirens working in accordance with different programs |
| 02/07/1990 | EP0179898B1 A two way personal message system with extended coverage |
| 01/30/1990 | US4897835 In a time division multiplexed communication method |
| 01/30/1990 | US4896805 Certain improvements to a pager carrying case |
| 01/23/1990 | US4896134 Armored self-contained outdoor/indoor siren assembly |
| 01/16/1990 | US4894649 Portable communication device |
| 01/11/1990 | WO1990000297A1 Voice controlled pager |
| 01/10/1990 | EP0350049A2 Method and system for generating alarm in automatic chemical analysis apparatus |
| 01/02/1990 | US4891637 Acknowledge back pager with apparatus for controlling transmit frequency |
| 12/28/1989 | DE3821298A1 Device for emitting (broadcasting) information in a locally limited region |
| 12/27/1989 | EP0347938A2 Paging system having an effective ID-code transferring function |
| 12/20/1989 | EP0346406A1 Paging receiver for storing digitized voice messages |
| 12/13/1989 | CN2049382U Mechanical burglar alarm and door bell signaling device |
| 12/06/1989 | EP0344149A1 System for over-the-air reprogramming of communication receivers. |
| 12/05/1989 | US4885577 Paging system for providing a data message and a voice message to a unique address of a paging receiver |
| 12/05/1989 | CA1263708A1 Method and receiver for receiving messages sent by radio |
| 11/29/1989 | CN2048612U Four function electronic door bell warner |
| 11/23/1989 | EP0342638A2 Radio paging communication system |
| 11/22/1989 | CN2047963U Multi-function music electromedical apparatus |
| 11/21/1989 | US4882744 Automatic paging system |
| 11/21/1989 | US4882579 Code division multiplexed acknowledge back paging system |
| 11/15/1989 | EP0341609A2 Voice paging system providing deferred paging capability |
| 11/15/1989 | CN2047811U Children's eyesight protector |
| 11/15/1989 | CN2047810U Informing device for kicked quilt by baby |
| 11/14/1989 | US4881073 Paging system with dynamically programmable reception frequencies |
| 11/08/1989 | CN2047417U Sounder for driver noding and electric shock awakening device |