Patents
Sitemap › G10 - Musical instruments; Acoustics › G10K - Sound-producing devices; methods or devices for protecting against, or for damping, noise or other acoustic waves in general; Acoustics not otherwise provided for › G10K 7 - Sirens
Patents for G10K 7 - Sirens (209)
02/2003
02/12/2003EP1282895A1 Electro-aero-acoustic source and system for active noise control
01/2003
01/01/2003CN2529345Y Device for locating whistle device of electric siren
08/2002
08/28/2002CN2508345Y Air defence alarm
08/28/2002CN2508344Y Air defence alarm
08/01/2002US20020101333 Siren
03/2002
03/07/2002DE10036573A1 Siren drive circuit, e.g. for burglar alarm has additional micro-controller for providing communication via data line in event of fault
03/06/2002CN1339237A Sound generator with a pump actuator
01/2002
01/09/2002EP1170064A1 Gas oscillatory wave generator
11/2001
11/15/2001WO2001086632A1 Electro-aero-acoustic source and system for active noise control
10/2001
10/31/2001EP1149507A2 Sound generator with a pump actuator
08/2001
08/14/2001CA2156166C Rotary low-frequency sound reproducing apparatus and method
06/2001
06/14/2001WO2001043492A1 Pneumatically driven loudspeaker
03/2001
03/21/2001EP1084589A1 Pneumatically driven loudspeaker and its use
12/2000
12/21/2000WO2000047012A3 Sound generator with a pump actuator
10/2000
10/17/2000US6133656 Brushless commutated torque motor for use with a rotary low frequency sound reproducing apparatus
08/2000
08/10/2000WO2000047012A2 Sound generator with a pump actuator
08/03/2000DE19904106A1 Schallgenerator mit Pumpantrieb Sound generator with pump drive
07/2000
07/06/2000WO2000038848A1 Gas oscillatory wave generator
07/06/2000CA2356676A1 Pulsating vibration air generation means
05/2000
05/31/2000EP0733247A4 A siren unit
03/2000
03/22/2000CN2370517Y Positioner in electric alarm
01/2000
01/25/2000US6017302 Subliminal acoustic manipulation of nervous systems
01/18/2000US6016351 Directed radiator with modulated ultrasonic sound
12/1999
12/21/1999US6005478 Siren unit
10/1999
10/21/1999WO1999053720A1 Pneumatically driven loudspeaker and its use
09/1999
09/01/1999CN2336449Y Electrical safety mistake preventing speech prompting device for electric power plant and transformer substation
04/1999
04/07/1999EP0906611A1 Acoustic transducers using a working fluid
10/1998
10/20/1998US5825901 Rotary low-frequency sound reproducing apparatus and method
08/1998
08/19/1998CN2288488Y Movable siren
04/1998
04/15/1998CN2278986Y Siren post-office box
01/1998
01/22/1998WO1998002976A1 Directed radiator with modulated ultrasonic sound
01/22/1998DE19628849A1 Richtstrahler durch modulierten Ultraschall Directional spotlight by modulated ultrasound
12/1997
12/31/1997WO1997050077A1 Acoustic transducers using a working fluid
08/1997
08/14/1997DE19639157A1 Acoustic siren for intruder alarm system
06/1997
06/03/1997US5636178 Fluid driven siren pressure pulse generator for MWD and flow measurement systems
04/1997
04/23/1997CN2253035Y Magnet electronic alarm sounder
09/1996
09/25/1996EP0733247A1 A siren unit
09/19/1996WO1996018183A3 High-volume acoustic source transducer
08/1996
08/01/1996WO1996023295A1 Active noise control device
07/1996
07/10/1996EP0720810A1 Rotary low-frequency sound reproducing apparatus and method
06/1996
06/13/1996WO1996018183A2 High-volume acoustic source transducer
05/1996
05/14/1996US5517173 Apparatus generating noise sound for electric car
02/1996
02/26/1996EP0720810A4 Rotary low-frequency sound reproducing apparatus and method
01/1996
01/16/1996US5484969 High-volume acoustic transducer
06/1995
06/15/1995WO1995016248A1 A siren unit
02/1995
02/01/1995CN1027525C High-voltage alarm safety helmet
01/1995
01/04/1995EP0632428A2 Apparatus generating noise sound for electric car
09/1994
09/01/1994WO1994019914A1 Rotary low-frequency sound reproducing apparatus and method
05/1994
05/18/1994CN2165507Y Gas alarm for person
04/1994
04/13/1994CN2161968Y Alarm
03/1994
03/16/1994EP0360806B1 Air-driven low-frequency sound generator with positive feedback system
11/1993
11/03/1993CN2145427Y High-sound alarm loudspeaker
03/1993
03/02/1993US5191618 Rotary low-frequency sound reproducing apparatus and method
01/1993
01/20/1993CN1068026A Safety helmet with alarm for high voltage
08/1992
08/18/1992US5140641 Servo valve loudspeaker
12/1991
12/04/1991CN2090097U Steam loudspeaker for motor vehicle
04/1991
04/10/1991EP0420981A1 Device for generating acoustic oscillations in a liquid medium
04/09/1991US5005511 Air-driven low-frequency sound generator with positive feedback system
02/1991
02/06/1991EP0411168A1 Alarm siren
05/1990
05/03/1990WO1990004721A1 Device for generating acoustic oscillations in a liquid medium
04/1990
04/04/1990EP0360806A1 Air-driven low-frequency sound generator with positive feedback system.
01/1990
01/16/1990US4893655 Double valve mechanism for an acoustic modulator
08/1989
08/10/1989DE3803388A1 Siren rod
07/1989
07/11/1989US4847590 Outdoor warning siren
06/1989
06/07/1989CN2038712U Dual purpose fire prevention automatic alarm mosquito-repellent incense stand
03/1989
03/15/1989CN2034322U Electronic box sounding relay
02/1989
02/21/1989US4807203 Siren
02/21/1989US4805732 Motor powered sound emitter
01/1989
01/25/1989EP0300696A2 Sound generating system
11/1988
11/23/1988CN88201616U Electronic door bell for earthquake alarm
10/1988
10/20/1988WO1988007894A1 Air-driven low-frequency sound generator with positive feedback system
08/1988
08/11/1988DE3803035A1 Sounder
05/1988
05/17/1988CA1236717A2 Siren
05/17/1988CA1236716A2 Method of sealing between relatively movable components
09/1987
09/01/1987US4691194 Electric alarm siren with arc-like runner legs
05/1987
05/05/1987CA1221257A1 Siren
04/1987
04/15/1987CN86203352U Electronic bird-bell with the shape of potted landscape
03/1987
03/17/1987US4649853 Siren
03/12/1987DE3531467A1 Electronic sounder
10/1986
10/07/1986US4615530 Method of sealing between relatively movable components
03/1986
03/26/1986EP0070279B1 Pressurized gas driven sound emitter
03/12/1986EP0069741B1 Positively controlled sound generator
12/1985
12/17/1985US4558656 Siren
11/1985
11/19/1985US4554531 Omnidirectional siren
07/1985
07/16/1985US4529969 Siren
05/1985
05/21/1985US4517915 Low-frequency sound generator
10/1984
10/10/1984EP0121319A2 Siren
12/1983
12/20/1983CA1158930A1 Differential pressure signal device
07/1983
07/12/1983US4393374 Low power siren
05/1983
05/17/1983CA1146663A1 Low-frequency sound generator
05/10/1983CA1146258A1 Sound production using large volume plasmas
04/1983
04/19/1983CA1144867A1 Speaker grille for streamlined light bar mounted on vehicle roof
01/1983
01/26/1983EP0070279A1 Pressurized gas driven sound emitter.
01/19/1983EP0069741A1 Positively controlled sound generator.
12/1982
12/28/1982US4365582 Differential pressure signal device
11/1982
11/23/1982US4359962 Low-frequency sound generator
09/1982
09/14/1982US4349898 Sonic weapon system
06/1982
06/08/1982US4334211 Speaker grille for streamlined light bar mounted on vehicle roof
04/1982
04/29/1982WO1982001329A1 Pressurized gas driven sound emitter
04/29/1982WO1982001328A1 Positively controlled sound generator
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