| Patents for H04R 1 - Details of transducers (42,173) |
|---|
| 01/26/1989 | WO1989000799A1 Loudspeaker system with wide dispersion baffle |
| 01/26/1989 | DE3819398A1 Acoustic pressure pick-up insensitive to wind influences |
| 01/26/1989 | DE3723171A1 Explosion-protected sound transducer |
| 01/25/1989 | EP0300395A2 Device for storing an electrical connecting cable |
| 01/18/1989 | CN2031185U Loud-speaker box with lamp light |
| 01/18/1989 | CN1030507A Ultralight loudspeaker enclosures |
| 01/17/1989 | US4799265 Electrostatic transducer unit |
| 01/17/1989 | US4799264 Speaker system |
| 01/12/1989 | DE3721886A1 Loudspeaker enclosure |
| 01/11/1989 | CN1030338A Speaker system |
| 01/11/1989 | CN1030337A Ultraviolet sterilizer for telephone transmitter |
| 01/11/1989 | CN1030330A Piezoelectric transducer with multiple sensitive coaxial elements |
| 01/11/1989 | CN1030316A Method for large-scale multiple source sound reinforcement |
| 01/10/1989 | US4797935 Speaker system with independently supported top plate |
| 01/10/1989 | US4797934 Speaker headrest |
| 01/04/1989 | EP0297948A1 Piezoelectric transducer comprising several coaxial sensitive elements |
| 01/04/1989 | EP0297101A1 Flextensional transducers. |
| 01/04/1989 | EP0297100A1 Sonar transducers. |
| 01/03/1989 | US4795935 Ultrasonic transducer |
| 01/03/1989 | US4795369 Electrical connector apparatus for a loudspeaker motor |
| 12/29/1988 | WO1988010549A1 Loudspeaker mounting |
| 12/28/1988 | EP0297008A1 Very high performance acoustic enclosures |
| 12/27/1988 | US4794295 Acoustic transducer |
| 12/21/1988 | EP0295971A1 High fidelity electroacoustic power transducer with a staggered diffusion system |
| 12/21/1988 | EP0295644A2 Speaker system |
| 12/21/1988 | EP0295641A2 Loudspeaker system |
| 12/20/1988 | US4792978 Planar loudspeaker system |
| 12/15/1988 | WO1988010055A1 Method for large-scale multiple source sound reinforcement |
| 12/15/1988 | WO1988010054A1 Ultralight loudspeaker enclosures |
| 12/15/1988 | DE3815847A1 Mikrophon-windschutzvorrichtung Microphone wind protection device |
| 12/15/1988 | DE3718902A1 Vertically adjustable stand for securing lights, microphones, sheet music and the like |
| 12/14/1988 | EP0140901B1 Variable aperture microphone |
| 12/14/1988 | CN87216419U Noise-removing earphone |
| 12/13/1988 | US4791674 Microphone suspension assembly |
| 12/13/1988 | US4791673 Bone conduction audio listening device and method |
| 12/13/1988 | US4790408 Coiled exponential bass/midrange horn loudspeakers |
| 12/13/1988 | US4790407 Resonance-compensated speaker system for vehicle |
| 12/06/1988 | US4790020 Horn type loudspeakers |
| 12/06/1988 | US4789044 Narrow directional microphone |
| 12/06/1988 | US4788724 Motorcycle helmet microphone mount and plug mount |
| 12/01/1988 | DE3817351A1 Vibration-damping mounting for a loudspeaker system |
| 11/30/1988 | EP0292518A1 A composite sonar transducer for operation as a low frequency underwater acoustic source |
| 11/29/1988 | US4787472 Audio speaker apparatus |
| 11/23/1988 | EP0291913A2 Head phones for a miniature cassette player |
| 11/23/1988 | EP0291677A2 Loudspeaker |
| 11/23/1988 | CN88210861U New type interview speaker |
| 11/22/1988 | US4786356 High frequency resonator for welding material |
| 11/22/1988 | US4785908 Vented loudspeaker |
| 11/10/1988 | DE3713398A1 Enclosure-type loudspeaker |
| 11/09/1988 | EP0289750A1 Method and device for making and ear tip |
| 11/09/1988 | EP0289593A1 Sound reinforcement enclosure employing cone loudspeaker with annular central loading member and coaxially mounted compression driver |
| 11/08/1988 | US4783820 Loudspeaker unit |
| 11/03/1988 | WO1988008657A1 Procedure and device for facilitating audiovisual observation of a distant object |
| 11/03/1988 | DE3736591A1 Hearing aid with protection against ear wax |
| 11/03/1988 | DE3713125A1 Loudspeaker system |
| 10/25/1988 | US4780862 Borehole televiewer |
| 10/25/1988 | US4779615 Tactile stimulator |
| 10/18/1988 | US4779020 Ultrasonic transducer |
| 10/18/1988 | US4778134 Speaker wall bracket |
| 10/18/1988 | US4778027 Reverberation support assembly |
| 10/13/1988 | DE3807170A1 Mikrophon-windschutzvorrichtung Microphone wind protection device |
| 10/11/1988 | US4777650 Dual cavity pressure microphones |
| 10/11/1988 | US4777574 Dental lamp shield or prophylactic |
| 10/06/1988 | WO1988007802A1 Air-tight loudspeaker housing |
| 10/04/1988 | US4776018 Removable sound or/and display apparatus |
| 09/29/1988 | DE3808055A1 Mikrofonhalterung Microphone holder |
| 09/29/1988 | DE3708353C1 Device for reeling up a stereo headset cable for personal recorders or the like |
| 09/28/1988 | EP0284051A1 Hermetically sealed loudspeaker box |
| 09/27/1988 | US4773502 Enclosure for loudspeaker systems |
| 09/22/1988 | WO1988006855A1 Housing for an entertainment electronics appliance |
| 09/20/1988 | US4773096 Digital switching power amplifier |
| 09/20/1988 | US4773095 Hearing aid with locating microphones |
| 09/20/1988 | US4773091 Telephone handset for use in noisy locations |
| 09/15/1988 | DE3707389A1 Loudspeaker box with integrated adjustable base |
| 09/14/1988 | EP0281956A1 Cabinet for electronic entertainment equipment |
| 09/13/1988 | US4771454 Ruggedized ear protector and communications headset |
| 09/13/1988 | US4771205 Ultrasound transducer |
| 09/08/1988 | DE3805953A1 Loudspeaker system |
| 09/08/1988 | DE3706157A1 Loudspeaker unit |
| 09/07/1988 | EP0281084A2 Loudspeaker unit |
| 09/07/1988 | CN87217058U 折叠耳机 Folding headphones |
| 09/06/1988 | US4768870 Combined loudspeaker and motorcycle driving mirror |
| 09/06/1988 | US4768615 Acoustic transducer system |
| 09/06/1988 | US4768614 Unidirectional enhancer for microphones |
| 08/31/1988 | EP0280162A2 Loudspeaker box with an airtight enclosure |
| 08/30/1988 | CA1241432A1 End weighted reed sound transducer |
| 08/23/1988 | US4765580 Loudspeaker support |
| 08/23/1988 | US4765481 Packaged airline headsets |
| 08/17/1988 | CN87214674U Sealed box type speaker system with pressure sensor |
| 08/16/1988 | US4764962 Stereo speaker system for walkman-type radio and/or cassette player |
| 08/16/1988 | US4764961 Cassette type stereo speaker system |
| 08/16/1988 | US4764907 Underwater transducer |
| 08/16/1988 | US4764695 Vibrator |
| 08/16/1988 | US4763753 Insert earphones for audiometry |
| 08/16/1988 | CA1240787A1 Transducer device |
| 08/11/1988 | WO1988005685A1 Device for producing light effects |
| 08/11/1988 | DE3702872A1 Stereometric passive loudspeaker for loudspeaker systems |
| 08/09/1988 | US4763307 Wide-range audio frequency underwater transducer |
| 08/04/1988 | EP0260313A4 Adaptor for coupling plural compression drivers to a common horn. |
| 08/03/1988 | EP0276996A2 Microphone |