| Patents for H04R 1 - Details of transducers (42,173) |
|---|
| 07/14/1992 | US5131050 Method and device for generating sound in a hall |
| 07/14/1992 | CA1305248C Piezoelectric sensor with at least one pair of long, flexible, sensitiveelements |
| 07/08/1992 | EP0494124A1 Omnidirectional loudspeaker arrangement |
| 07/08/1992 | EP0493986A2 Digital transmitting and receiving apparatus for cordless headphones |
| 07/08/1992 | EP0493483A1 Transducer enclosure |
| 07/08/1992 | EP0493450A1 Planar speakers |
| 07/08/1992 | CN2109676U Multifunctional sound box |
| 07/08/1992 | CN2109675U Ear phone plug |
| 07/08/1992 | CN1062632A Capacitor microphone cartridge |
| 07/07/1992 | US5129006 Electronic audio signal amplifier and loudspeaker system |
| 07/01/1992 | EP0493361A2 Telephone-handset fitted with a directional microphone |
| 07/01/1992 | EP0492919A2 Television receiver loudspeaker device |
| 07/01/1992 | EP0492882A2 Moment bender transducer drive |
| 07/01/1992 | CN2109034U Sounder |
| 07/01/1992 | CN2109033U Magnesite concrete sounder |
| 06/30/1992 | US5125732 Motion picture exhibition facility |
| 06/30/1992 | US5125473 Speaker damper configuration |
| 06/25/1992 | WO1992010917A1 Acoustic device |
| 06/24/1992 | EP0490930A1 Electromagnetic resonant vibrator. |
| 06/24/1992 | CN2108390U Housing of sound box |
| 06/23/1992 | US5125033 Body sense speaker |
| 06/23/1992 | US5125032 Talk/listen headset |
| 06/23/1992 | US5125031 Speaker system with focused vibration |
| 06/23/1992 | US5123500 Loudspeaker enclosure |
| 06/23/1992 | US5123418 Micro-echographic probe for ultrasound collimation through a deformable surface |
| 06/21/1992 | CA2058131A1 Loudspeakers |
| 06/17/1992 | EP0490214A2 Contact assembly between a transducer and a circuit board arranged in a handset of a subscriber set |
| 06/17/1992 | CN2107746U Telephone weighted acitve filter |
| 06/17/1992 | CN1062068A Method for developing functions of sound equipment |
| 06/10/1992 | EP0489551A2 Loudspeaker system having multiple subchambers |
| 06/10/1992 | CN2107099U Active speaker for pocket-type recorder |
| 06/09/1992 | US5121426 Loudspeaking telephone station including directional microphone |
| 06/09/1992 | CA1302901C Removable audio-visual apparatus |
| 06/04/1992 | CA2056566A1 Electroacoustical transducing with at least three cascaded subchambers |
| 06/03/1992 | EP0488338A1 Body-felt sound unit and vibration transmitting method therefor |
| 06/03/1992 | CN2106464U Sound-control headgear type transmitter and receiver |
| 06/02/1992 | US5119431 Efficiency loudspeaker |
| 06/02/1992 | US5119430 Sound amplifier system |
| 06/02/1992 | US5119429 Audio installation, in particular stereophonic, for television sets with a large built-in low-frequency loudspeaker |
| 06/02/1992 | US5119428 Electro-acoustic system |
| 06/02/1992 | US5119421 Stereo system cabinet with loudspeaker door assembly |
| 06/02/1992 | US5117938 Speaker installing holder |
| 05/27/1992 | CN2105818U Microphone health cover |
| 05/27/1992 | CN1061504A Speaker front sheet |
| 05/26/1992 | US5117465 Earphone with adjustable headband with progressively shallow detents |
| 05/26/1992 | US5117464 Adjustable clip-on headphones |
| 05/26/1992 | US5117463 Speaker system having directivity |
| 05/26/1992 | US5117462 Phasing plug for compression driver |
| 05/26/1992 | US5117461 Electroacoustic device for hearing needs including noise cancellation |
| 05/26/1992 | US5117403 Above and below water sound transducer |
| 05/26/1992 | US5115884 Low distortion audio speaker cabinet |
| 05/26/1992 | US5115883 Loudspeaker |
| 05/26/1992 | US5115882 Omnidirectional dispersion system for multiway loudspeakers |
| 05/21/1992 | DE4036334A1 Reflex type audio loudspeaker housing - has three different types of hole in front cover, all of identical appearance |
| 05/21/1992 | DE4036152A1 Audio loudspeaker arrangement for stereo signals - has high frequency loudspeaker angled to bounce sound waves off room wall |
| 05/20/1992 | EP0191075B1 System and method for compensating hearing deficiences |
| 05/20/1992 | CN2105157U Simle sterilizing device for telephone and mic |
| 05/19/1992 | US5115474 Speaker system |
| 05/19/1992 | US5115473 Transducer having two ducts |
| 05/19/1992 | US5115472 Electroacoustic novelties |
| 05/19/1992 | US5115414 Conical ultrasonic wave deflection system |
| 05/19/1992 | US5113968 Speaker grill assembly |
| 05/19/1992 | CA1301075C Vented loudspeaker |
| 05/19/1992 | CA1301074C Video sound |
| 05/13/1992 | EP0485284A1 Sound distributor with symmetry around the rotational axis |
| 05/13/1992 | CN1061127A Multi-model earphone combiner |
| 05/12/1992 | US5113428 Cordless telephone headset |
| 05/12/1992 | US5111905 Speaker enclosure |
| 05/06/1992 | EP0484306A1 Ear-protection cup for ear muffs or headphones |
| 05/06/1992 | EP0484267A1 Telephone handset protector device |
| 05/06/1992 | EP0483559A2 Handset structure for telephone sets |
| 05/06/1992 | EP0483185A1 Electrodynamic sound generator for a hearing aid |
| 05/06/1992 | CN1016570B Piezoelectric sensor comprising at least one pair of flexible sensitive elements of great length |
| 05/06/1992 | CN1016569B Tubular piezo-electric sensor with high sensitivity |
| 05/06/1992 | CN1016568B Loudspeaker arrangement |
| 05/06/1992 | CN1016567B Speaker system |
| 05/05/1992 | US5111509 Electric acoustic converter |
| 05/05/1992 | CA1300256C Inertial microphone/receiver with extended frequency response |
| 04/30/1992 | WO1992007449A1 Sound output device |
| 04/29/1992 | CN2103228U Anti-bacterium. deodorization. disinfect microphone cover |
| 04/28/1992 | US5109424 Stereo headphones with plug, receptacle and securing plates |
| 04/28/1992 | US5109423 Audio system with amplifier and signal device |
| 04/28/1992 | US5109422 Acoustic apparatus |
| 04/28/1992 | US5109421 Fetal speaker system and support belt for maternal wear |
| 04/28/1992 | US5109420 Car audio device |
| 04/28/1992 | US5109416 Dipole speaker for producing ambience sound |
| 04/28/1992 | US5109410 Two-line, hands-free telephone system |
| 04/28/1992 | US5108338 Musical balloon |
| 04/28/1992 | CA1299662C Audio communications module for an office chair |
| 04/23/1992 | DE4033082A1 Radio with loudspeaker dispersing perfume or fragrance - uses air movement behind diaphragm to emit scent-powders |
| 04/22/1992 | EP0481163A2 Car-loudspeaker |
| 04/22/1992 | EP0297101B1 Flextensional transducers |
| 04/22/1992 | EP0297100B1 Sonar transducers |
| 04/21/1992 | US5107540 Electromagnetic resonant vibrator |
| 04/21/1992 | US5105906 Sound reproduction speaker with improved directional characteristics |
| 04/21/1992 | US5105905 Co-linear loudspeaker system |
| 04/17/1992 | WO1992007448A1 Method of improving the quality of sound reproduction and apparatus for carrying out said process comprising at least one loudspeaker emitting in three directions |
| 04/17/1992 | CA2094293A1 Method for improving the quality of sound reproduction and apparatus comprising at least one tridirectional speaker using said method |
| 04/15/1992 | EP0480160A2 Dome-shaped high-frequency loudspeaker |
| 04/15/1992 | EP0480087A1 Low frequency loudspeaker system |