| Patents for H04R 1 - Details of transducers (42,173) |
|---|
| 11/10/1992 | US5163167 Sound wave guide |
| 11/10/1992 | US5163093 Microphone mounting for a person's neck |
| 11/10/1992 | US5161771 Amplifier or speaker support combination |
| 11/04/1992 | CN2121103U Circular adapter for sound equipment |
| 11/03/1992 | US5161200 Microphone |
| 10/29/1992 | WO1992019079A1 Microphone mounting system |
| 10/29/1992 | WO1992018974A1 Expandable sonar array |
| 10/29/1992 | DE4113101A1 Mikrofonhalterungssystem Microphone mounting system |
| 10/28/1992 | EP0510345A2 Loudspeaker for use in a vehicle |
| 10/27/1992 | CA1309489C Microphone with frequency pre-emphasis channel plate |
| 10/21/1992 | CN2119733U Diafragm type string audio-frequency receiving sensor |
| 10/21/1992 | CN2119732U Table boom microphone mounting |
| 10/20/1992 | WO1992019080A1 Improvements in and relating to transmission line loudspeakers |
| 10/20/1992 | US5157730 Pulse rate modulation type piezoelectric crystal driver device |
| 10/20/1992 | CA2108696A1 Improvements in and relating to transmission line loudspeakers |
| 10/15/1992 | WO1992017991A1 Inconspicuous communication method utilizing remote electromagnetic drive |
| 10/13/1992 | US5154382 Angle adjusting mechanism |
| 10/13/1992 | US5154381 Microphone boom holder |
| 10/13/1992 | CA1308804C Electro acoustic transducer and loudspeaker |
| 10/07/1992 | EP0452486A4 Voice transmission system |
| 10/07/1992 | CN2118377U Motion feedback active sound box |
| 10/07/1992 | CN2118376U Listening tube type earphone |
| 10/06/1992 | US5153915 Speaker filtering circuit and support therefor |
| 10/06/1992 | US5153859 Laminated piezoelectric structure and process of forming the same |
| 10/03/1992 | CA2039610A1 Portable dispostable cover for hand-held voice instruments |
| 10/02/1992 | CA2106459A1 Inconspicuous communication method utilizing remote electromagnetic drive |
| 09/30/1992 | EP0505635A2 A mounting bracket |
| 09/30/1992 | EP0505382A1 Coil assemblies. |
| 09/30/1992 | CN2117681U Miniature earplug type radio |
| 09/29/1992 | US5151944 Headrest and mobile body equipped with same |
| 09/24/1992 | CA2059924A1 Mounting bracket |
| 09/23/1992 | EP0505344A1 Sound reproduction device without mechanical intermodulation distorsion |
| 09/23/1992 | EP0504841A2 Ultrasonic beam forming system |
| 09/22/1992 | US5150419 Calotte-type treble loudspeaker |
| 09/22/1992 | US5150418 Speaker system |
| 09/22/1992 | US5150417 Bass reflex type speaker system |
| 09/17/1992 | WO1992016081A1 Loudspeaker enclosure |
| 09/17/1992 | WO1992015369A1 Retrofitting gas mask voice amplifier unit |
| 09/17/1992 | DE4107298A1 Acoustic spherical radiator of first order - has piezoelectric transducer discs within interior of thin-walled sphere |
| 09/16/1992 | EP0503611A1 Doubly concave high-pitch loudspeakers |
| 09/15/1992 | US5148492 Diaphragm of dynamic microphone |
| 09/15/1992 | US5147986 For providing acoustic energy |
| 09/15/1992 | US5146808 Angle adjusting mechanism for an article support |
| 09/09/1992 | EP0502841A1 Sound permeable cover, particularly for loudspeakers |
| 09/09/1992 | CN2115634U Stereophonic amplifier |
| 09/09/1992 | CN2115633U Folding elastic supporter |
| 09/08/1992 | US5146619 Ear-supported radio |
| 09/08/1992 | US5146501 Altitude-sensitive portable stereo sound set for dancers |
| 09/08/1992 | US5146435 Acoustic transducer |
| 09/02/1992 | EP0500985A1 Bone conduction microphone mount |
| 09/02/1992 | CN2114935U Portable foldable miniature stereo speaker box |
| 09/02/1992 | CN2114934U Speaker box |
| 09/02/1992 | CN2114933U Push-pull phase inversion speaker box |
| 09/01/1992 | US5144677 Hand-held microphone apparatus with resilient stabilizing ring |
| 09/01/1992 | US5144670 Sound output system |
| 09/01/1992 | US5144656 Transmitter for communication equipment |
| 09/01/1992 | US5143339 Speaker mounting assembly |
| 08/26/1992 | EP0500294A2 Stereophonic sound reproducing apparatus |
| 08/26/1992 | EP0499699A1 Hearing aid with at least two microphones |
| 08/26/1992 | CN2114258U Side open sounder |
| 08/25/1992 | US5142700 Protective helmet containing an integral transceiver |
| 08/25/1992 | US5142587 Intra-concha type electroacoustic transducer for use with audio devices etc. |
| 08/25/1992 | US5142508 Aquatic transducer system |
| 08/25/1992 | US5142187 Piezoelectric composite transducer for use in ultrasonic probe |
| 08/20/1992 | DE4104481A1 Single system for simultaneously emitting sound and light effects - with light effects system connected in direct neighbourhood with conventional loud speakers but can also be controlled independently |
| 08/19/1992 | CN2113580U Multisocket board for earphone |
| 08/18/1992 | US5140560 Pressure compensated transducer system with constrained diaphragm |
| 08/18/1992 | US5140460 Motion-picture screen |
| 08/18/1992 | US5139319 Exterior structure for cabinet |
| 08/18/1992 | US5138722 Headset ear seal |
| 08/18/1992 | CA1306420C Speaker system |
| 08/13/1992 | DE4103817A1 Ball-shape loudspeaker used in sub-woofer satellite system - is fixed on tensioned cables via which it is operated by amplifier, contg. sprung power feeds |
| 08/13/1992 | DE4103613A1 Stereo condenser microphone involving three microphone systems in common housing - are connected via common changeover switch to amplifiers for left and right-hand channels, changeover switch comprising three individual switches |
| 08/12/1992 | CN2112915U Thin andio device with surface art decoration |
| 08/12/1992 | CN2112914U Reverberation microphone |
| 08/11/1992 | US5138666 Voice transmission system |
| 08/11/1992 | US5138663 Method and apparatus for performing noise cancelling and headphoning |
| 08/11/1992 | US5138656 Intercom with transducer enclosure to attenuate resonant frequencies |
| 08/11/1992 | US5138586 Acoustic logic circuits |
| 08/11/1992 | US5138526 Interface slot and speaker seat structure for a mother board |
| 08/11/1992 | US5137110 Highly directional sound projector and receiver apparatus |
| 08/06/1992 | WO1992013347A1 Sound recording and replay device |
| 08/04/1992 | US5136657 Sound device mounted in a helmet |
| 08/04/1992 | US5136656 Probe microphone |
| 08/04/1992 | US5136640 Replaceable aromatic sticker for use in a telephone handset |
| 08/04/1992 | US5136639 Telephone handset cushion |
| 08/04/1992 | US5136555 Integrated diver face mask and ultrasound underwater voice communication apparatus |
| 07/29/1992 | CN2111604U Moving coil string audio frequency receiving sensor |
| 07/28/1992 | US5134660 Audio harness for video camera |
| 07/28/1992 | US5134659 Method and apparatus for performing noise cancelling and headphoning |
| 07/28/1992 | US5134655 Headphone with microphone |
| 07/28/1992 | US5133428 Direction-adjustable speaker system |
| 07/25/1992 | CA2034913A1 Loudspeaker enclosure and method of making same |
| 07/23/1992 | WO1992012604A1 Electoacoustic transducer system for sound recording or reproduction |
| 07/23/1992 | DE4101298A1 Peg system for violin-cello or double bass - has microphone mounted on adaptor provided between peg and adjustable holder |
| 07/22/1992 | CN2110966U Multi-person audio-visual converter for household tv set |
| 07/21/1992 | US5133018 Audio speaker connector employing concentrically oriented speaker contacts |
| 07/16/1992 | DE4100708A1 Spherical housing contg. reflex horn for sound reproduction - has centrally divided horn with internal space shaped to minimise distortion and over modulation of acoustic waves |
| 07/15/1992 | CN2110327U Multi-position sound box |
| 07/14/1992 | US5131052 Mid-range loudspeaker assembly propagating forward and backward sound waves in phase |