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)
03/1983
03/02/1983EP0072787A1 Alarm system
02/1983
02/22/1983US4375061 Digitally driven audio effects generator
02/16/1983EP0071851A1 Piezoelectric three-tone buzzer
01/1983
01/25/1983US4370753 Battery saver for a tone coded signalling system
01/18/1983US4369443 Message communication system with message storage
01/11/1983US4367933 Audible indication device for cameras
12/1982
12/23/1982WO1982004491A1 A method for implementing a calling process bound to a person
12/07/1982US4363031 Wireless alarm system
12/07/1982US4363028 Electronic siren
11/1982
11/16/1982US4359714 Voice warning system for an automotive vehicle
10/1982
10/26/1982US4356519 Portable answering device
10/06/1982EP0061462A1 Multi-system portable paging device.
09/1982
09/28/1982US4352091 Radio pager having optional annunciating means
09/28/1982US4352089 Voice warning system for an automotive vehicle
09/02/1982WO1982002972A1 Customer queue control apparatus
09/02/1982WO1982002971A1 Electronic warning system
08/1982
08/24/1982US4346363 Electronic circuit for sensing deviations in physical forces thereon
07/1982
07/30/1982EP0050624A4 Electrical supervisory control and data acquisition system.
07/27/1982US4342023 Noise level controlled voice warning system for an automotive vehicle
06/1982
06/29/1982US4337460 Hand-held sound effects device
06/22/1982CA1126352A1 Electronic amplifier
06/15/1982US4335379 Method and system for providing an audible alarm responsive to sensed conditions
06/15/1982US4335377 Medical alert alarm
06/15/1982CA1125870A1 Tone signal detectors
05/1982
05/27/1982WO1982001780A1 Means for assisting in locating an object
05/26/1982EP0052306A1 Device for sensing, transferring and processing data presented in code form, preferably in bar code
05/18/1982US4330780 Radio paging receiver having pre-recorded voice messages which are selected by address codes and read out responsive to a suffix code
05/18/1982CA1123945A1 Vibration alarm device
05/13/1982WO1982001612A1 Alarm system
05/05/1982EP0050624A1 Electrical supervisory control and data acquisition system.
05/04/1982US4328485 Binary alarm
04/1982
04/27/1982CA1122692A1 Audio-detector alarm
04/20/1982US4326276 Musical door chime preferably also combined with a clock for annunciating the time
04/15/1982WO1982001268A1 Multi-system portable paging device having a microprocessor for providing in real time multiple scheme decoding and energy-saving routines
04/13/1982CA1121622A1 Electronic chime
04/06/1982US4323883 Doorbell for pets
04/06/1982US4323881 Radio pager with reduced power consumption
03/1982
03/02/1982CA1119024A1 Chime tone audio system utilizing a piezoelectric transducer
02/1982
02/02/1982US4314316 Illuminating whistle
01/1982
01/26/1982US4313107 Tone signal detectors
01/12/1982US4310833 Electrically-energized horn
01/12/1982US4310825 Voice warning system for an automotive vehicle
01/05/1982US4309695 Electronic alarm circuit
12/1981
12/01/1981US4303908 Electronic sounder
12/01/1981US4303395 Emergency audible instruction apparatus for a fire extinguisher
11/1981
11/17/1981US4301392 Electronic flash system capable of automatic flash duration control
11/11/1981EP0039612A1 Multitone signalling device
10/1981
10/15/1981WO1981002962A1 Electrical supervisory control and data acquisition system
10/06/1981US4293851 Sound actuator
09/1981
09/22/1981US4291301 Reminder alarm system for preventing mislaying of personal articles
09/15/1981US4290053 Sound effects producer
09/08/1981CA1108700A1 Digital radio paging communication system
09/02/1981EP0034652A1 Mobile apparatus with a device for printing information
09/01/1981US4287513 Door knob alarm device
09/01/1981US4287510 Electronic signal generator with periodically varying frequency
08/1981
08/26/1981EP0034562A2 Signal station for fire alarm system
08/25/1981US4286257 Tone generator
08/18/1981US4284845 Pest eliminator
08/04/1981US4282520 Piezoelectric horn and a smoke detector containing same
08/04/1981US4282519 Interconnection of alarms of smoke detectors with distinguishable alarms
08/04/1981CA1106292A1 Control device for electronic warning device
07/1981
07/28/1981CA1106000A1 Selective call radio communication receiver
07/21/1981US4280123 Multitone signaling device
07/07/1981CA1104388A1 Piezoelectric audible indicator circuit
06/1981
06/30/1981CA1104062A1 Sound communication system
06/23/1981US4275388 Piezoelectric audible alarm frequency self-calibration system
06/23/1981US4275385 Infrared personnel locator system
06/23/1981US4275383 Patient signalling system
06/10/1981EP0030219A1 A frequency-matched signal device for persons with impaired hearing
05/1981
05/19/1981US4267774 Heat-sealed pyrotechnic cap
04/1981
04/07/1981US4260982 Pulse code modulation responsive alarm system
03/1981
03/25/1981EP0025537A1 Warning signal generator for feeding a pressure chamber loudspeaker
03/17/1981US4257036 Tone generator
03/17/1981US4257035 Alarm circuit for generating syllable-pause alarm codes
03/03/1981US4254503 Radio receiver for tone modulated signals
02/1981
02/24/1981US4253095 Alarm apparatus for detecting disturbance or other change of condition
02/24/1981US4253083 Traffic signal system for blind people
02/24/1981CA1096450A1 Alarm driver for a smoke detector
02/17/1981US4251807 Miniature buzzer
02/11/1981EP0023697A1 Circuitry for driving a signalling loudspeaker
02/10/1981US4250496 Audio chime-signal generating circuit
02/03/1981US4249206 Audio and visual intercommunication and surveillance system
01/1981
01/20/1981CA1094164A1 Radio signalling systems
01/06/1981US4243973 Home integrated signal system
12/1980
12/30/1980CA1092655A1 Battery saver for a tone coded signalling system
12/09/1980US4238787 Electronic siren amplifier
12/02/1980US4237448 Pager with escalating audio alert signal level
11/1980
11/25/1980US4236147 Automatic doorbell
11/18/1980US4234873 Alarm installation with a number of self powered indicating elements
11/04/1980US4232305 System for controlling an electronic warning device
11/04/1980CA1089020A1 Digital electronic control and switching arrangement
09/1980
09/30/1980US4225965 Wrist-mounted communication device
09/30/1980US4225953 Personnel locator
08/1980
08/26/1980US4219799 Vehicular signal apparatus
08/19/1980CA1084138A1 Remote signalling apparatus, particularly suitable for anti-theft and anti-burglary protection
08/05/1980CA1082962A1 High output audible alarm device utilizing a piezoelectric transducer and voltage doubling means
07/1980
07/29/1980US4215339 Electronic chime
07/15/1980US4213121 Chime tone audio system utilizing a piezoelectric transducer
06/1980
06/17/1980US4208630 Narrow band paging or control radio system
06/11/1980EP0011713A1 Acoustic signal generator with periodically changing output signal frequency
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