Patents
Sitemap › G08 - Signalling › G08B - Signalling or calling systems; Order telegraphs; Alarm systems › G08B 3 - Audible signalling systems; Audible personal calling systems
Patents for G08B 3 - Audible signalling systems; Audible personal calling systems (6,083)
06/1980
06/03/1980US4206448 Multiple mode sound generator
05/1980
05/20/1980US4204200 Electronic horn arrangement
03/1980
03/25/1980US4195285 Double buzzer assembly
03/25/1980US4195263 Selective call radio communication receiver
03/25/1980CA1074401A1 Selective calling system
03/18/1980US4194153 Digital radio paging communication system
03/04/1980US4191944 Electromagnetic sound generator and method of making same
02/1980
02/19/1980US4189718 Electronic siren
02/19/1980US4189701 Hydroacoustic detection system
02/12/1980US4187635 Method and apparatus for sound production
01/1980
01/15/1980US4183278 Driver circuit for tone generator
01/01/1980US4181893 Battery saver for a tone coded signalling system
12/1979
12/25/1979US4180810 Silent awakening system
12/18/1979USRE30174 Sound simulator for model steam engine
12/18/1979CA1068139A1 Programmable electronic siren
11/1979
11/27/1979US4176343 Portable remote control signal
11/27/1979US4175677 Self-contained actuation and detection device
10/1979
10/16/1979US4170955 Danger alarm device
10/09/1979US4170769 Audio-detector alarm
08/1979
08/14/1979US4164735 Piezoelectric audible indicator circuit
08/14/1979US4164731 Electrical communication signalling device
07/1979
07/31/1979US4163225 Mailbox signalling device
07/31/1979US4163223 Buzzer with electronic integrated oscillation circuit
07/10/1979US4160411 Sound signal body for generating underwater sound signals
07/10/1979CA1057984A1 Lint alarm assembly
06/1979
06/12/1979CA1056213A1 Well-hole gondola car for carrying stack containers
04/1979
04/24/1979US4151514 Manually programmable audible alarm system
04/24/1979US4151472 Selective calling circuit employing controlled power supply therefor
03/1979
03/20/1979US4145684 Alerting system with dual-address memory
03/13/1979US4144531 Drowsiness detecting apparatus
02/1979
02/20/1979CA1048822A1 High efficiency buzzer
02/13/1979US4139842 Audible alarm unit
01/1979
01/16/1979US4135146 Portable handclap generator
10/1978
10/03/1978CA1039824A1 Audible alarm device
09/1978
09/26/1978US4117467 Tamper resistant alarm annunciator
09/26/1978US4117461 Diet control apparatus
09/26/1978US4117262 Sound communication system
08/1978
08/29/1978US4110750 Programmable electronic door chime
08/29/1978US4110738 Anti-theft alarm with coded radio link
08/22/1978CA1037173A1 Paging intercommunication system
08/01/1978US4104628 High output audible alarm device utilizing a piezoelectric transducer and voltage doubling means
07/1978
07/18/1978US4101885 Musical chime device
07/18/1978US4101873 Device to locate commonly misplaced objects
07/11/1978US4100581 Door actuated message device
07/11/1978US4100543 Audible alarm apparatus particularly adaptable for use with fire and theft security systems
05/1978
05/30/1978US4092062 Signal device for electro-acoustic reproducing equipment
05/30/1978US4091762 Audible vibratory reed assembly
05/30/1978US4091742 Stacked container well hole gondola car
05/23/1978US4091370 Fluid control for electrical circuit
05/09/1978US4088995 System for selectively operable dual simultaneous siren broadcast from a single speaker
05/09/1978US4088836 Acoustically responsive signal injection system for headphone users
05/02/1978US4087793 Digital electronic control and switching arrangement
04/1978
04/25/1978US4086589 Audible electronic warning system
04/11/1978US4084157 Smoke and heat detector alarm
03/1978
03/14/1978US4079271 Alarm driver for a smoke detector
02/1978
02/21/1978US4075627 Electric horn
02/21/1978US4075625 Audible electronic warning system
02/21/1978US4075624 Electronic siren structure and method
02/07/1978US4072903 Storage circuit for paging radio receivers
01/1978
01/17/1978US4069477 Tone address decoder for pager
12/1977
12/27/1977US4065767 Programmable electronic siren
12/20/1977US4064507 Noise generator circuit for a security system
12/06/1977US4061107 Clicker for indicating position of arrow
11/1977
11/08/1977US4057769 Circuit for generating two distinctive tone bursts with exponentially decaying envelopes
11/01/1977US4056741 Audible signal generating apparatus having selectively controlled audible output
10/1977
10/18/1977US4054869 Signal switching circuit for multiple sound siren system
09/1977
09/06/1977US4047187 System for exposure measurement and/or focus detection by means of image senser
08/1977
08/30/1977US4044712 Pressurized fluid powered horn
03/1977
03/01/1977US4010461 Alerting system with dual-address memory
03/01/1977US4010460 Alerting system with memory
11/1976
11/30/1976US3995268 Vehicle alarm
09/1976
09/28/1976US3983553 Appliance remote touch-control panel with sound system
09/14/1976US3981007 Industrial control for audible electronic warning system
08/1976
08/03/1976US3973200 Process for acknowledging calls in a system for wireless staff locators
07/1976
07/20/1976US3971017 Method and apparatus for exciting the driving coils of audible warning devices
07/20/1976US3971016 Electronic chirper
05/1976
05/11/1976US3956701 Personal paging receiver with swivel clip and distributed antenna
04/1976
04/20/1976US3952250 Receiver for a selective paging system
03/1976
03/30/1976US3947694 Sound communication system
03/16/1976US3945004 High efficiency buzzer
03/02/1976US3941933 Paging intercommunication system
02/1976
02/17/1976US3939385 Signalling apparatus for ships
02/10/1976US3938115 Combination smoke and heat detector alarm
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