| Patents for H04R 1 - Details of transducers (42,173) |
|---|
| 06/24/1993 | WO1993012637A1 Changeable art loudspeaker |
| 06/24/1993 | WO1993012626A1 Cerumen filter for hearing aids |
| 06/24/1993 | CA2122727A1 Cerumen filter for hearing aids |
| 06/23/1993 | EP0547138A1 Noise-cancelling handset. |
| 06/22/1993 | US5222151 Earphone |
| 06/22/1993 | US5222050 Water-resistant transducer housing with hydrophobic vent |
| 06/22/1993 | US5221069 Telescoping support bracket |
| 06/16/1993 | EP0545941A1 An ear protector. |
| 06/16/1993 | CN2136567Y Sounder with table lamp |
| 06/15/1993 | US5220608 Method and means for stereophonic sound reproduction |
| 06/10/1993 | WO1993011649A1 Loudspeaker |
| 06/09/1993 | EP0545731A1 Noise reducing microphone apparatus |
| 06/08/1993 | US5218176 Polyurethane foam, hot melt adhesives, fibergalss cloth and polyester resin laminate |
| 06/08/1993 | US5218175 Vehicle electroacoustical transducing |
| 06/08/1993 | CA1318966C Acoustical transducer mounting arrangement |
| 06/02/1993 | EP0544232A2 Sound collecting system and sound reproducing system |
| 06/01/1993 | US5216711 Telephone handset including directional microphone module |
| 06/01/1993 | US5216211 Audio-visual furniture stand |
| 06/01/1993 | US5216210 Loudspeaker system with passive sound reflective intensifier |
| 06/01/1993 | US5216209 Loudspeaker system and method for disbursing sounds waves |
| 05/27/1993 | WO1993010647A1 Ferroelectric composite film acoustic transducer |
| 05/27/1993 | WO1993010645A1 User selectable noise canceling for portable microphones |
| 05/27/1993 | WO1993010644A1 Watertight membrane for underwater acoustic device |
| 05/27/1993 | DE4236765A1 Stereo headphones for forwards localisation of audible sounds - has sound transducers supported by holder in bottom half of each earpiece capsule offset from centre vertical plane |
| 05/27/1993 | CA2121363A1 User selectable noise cancelling for portable microphones |
| 05/26/1993 | EP0543224A2 Speaker driving device |
| 05/26/1993 | EP0543087A2 Protection device for an electroacoustic transducer |
| 05/26/1993 | EP0542784A1 Hydraulic lever actuator. |
| 05/25/1993 | US5214710 Permanent magnet system with associated coil arrangement |
| 05/25/1993 | US5214709 Hearing aid for persons with an impaired hearing faculty |
| 05/25/1993 | US5214543 Portable audio apparatus having a power savings device |
| 05/25/1993 | US5214514 Compact video/sound apparatus with foldable screen |
| 05/19/1993 | EP0541777A1 Accoustic logic circuits |
| 05/19/1993 | EP0541646A1 Panel-form loudspeaker. |
| 05/19/1993 | EP0475983B1 Device for electroacoustic amplification of a stringed instrument with a tail piece |
| 05/19/1993 | CN2134016Y Loadspeaker |
| 05/19/1993 | CN1072305A Seaker |
| 05/18/1993 | US5212732 Effects speaker system |
| 05/18/1993 | US5212670 Flextensional hydrophone |
| 05/13/1993 | DE4239200A1 Active loudspeaker box for computer systems - has housing forming compact socket under monitor screen |
| 05/13/1993 | DE4137304A1 Bass sound generating system for motor vehicle audio installation - has loudspeaker and fan mounted on prefabricated synthetic base mounted in boot using existing threads |
| 05/12/1993 | EP0540862A2 Cap for sealing openings of ear fitments |
| 05/12/1993 | EP0540553A1 Composite acoustic system for telephone hand-sets |
| 05/12/1993 | EP0493450A4 Planar speakers |
| 05/12/1993 | EP0442969A4 Wholly microfabricated biosensors and process for the manufacture and use thereof |
| 05/11/1993 | US5210802 Acoustic imaging |
| 05/11/1993 | US5210467 Illumination control circuit using a photoreceptor built-in a remote control device |
| 05/11/1993 | US5209226 Underwater respiratory device |
| 05/05/1993 | CN1020535C Crystal speaker and manufacturing method thereof |
| 05/04/1993 | US5208868 Headphone overpressure and click reducing |
| 05/04/1993 | US5208867 Voice transmission system and method for high ambient noise conditions |
| 04/28/1993 | CN2131263Y Multifunctional electrometer |
| 04/27/1993 | USRE34236 Frequency attenuation compensated pneumatic headphone and liquid tube audio system for medical use |
| 04/27/1993 | US5206465 Sound collecting and concentrating device for attaching to the back of a loudspeaker |
| 04/27/1993 | US5206464 Loudspeaker mounting assembly |
| 04/21/1993 | EP0537705A2 A loudspeaker |
| 04/20/1993 | US5204907 Noise cancelling microphone and boot mounting arrangement |
| 04/20/1993 | US5204501 Synchronous common polar resonant wall type speaker cabinet |
| 04/15/1993 | WO1993007730A1 Process and system for sound pick-up, apparatus for sound pick-up and reproduction |
| 04/15/1993 | WO1993007729A1 Vacuum speaker |
| 04/15/1993 | CA2120488A1 Vacuum speaker |
| 04/13/1993 | US5201896 Universal audio speaker mounting bracket |
| 04/07/1993 | EP0535297A2 Spacer for coaxial loudspeakers |
| 04/06/1993 | US5201003 High fidelity stereophonic reproduction system |
| 04/06/1993 | US5200666 Ultrasonic transducer |
| 04/06/1993 | US5200051 Wholly microfabricated biosensors and process for the manufacture and use thereof |
| 04/06/1993 | CA1315866C Exterior structure for cabinet |
| 04/01/1993 | WO1993006697A1 A hygienic protection device for telephone handsets |
| 04/01/1993 | WO1993006696A1 Headset |
| 04/01/1993 | WO1993006678A1 A telephone cross-contamination barrier assembly |
| 03/31/1993 | EP0534084A1 Speaker system and circuit on the roof of the passenger compartment of a vehicle |
| 03/31/1993 | EP0533810A1 Microwave antennas. |
| 03/31/1993 | EP0375714B1 Loudspeaker |
| 03/31/1993 | CN1070532A Electret capacitive microphone |
| 03/30/1993 | US5198624 Audio transducer with controlled flexibility diaphragm |
| 03/30/1993 | US5197707 Isolation platform and method |
| 03/30/1993 | US5197332 Headset hearing tester and hearing aid programmer |
| 03/27/1993 | CA2052423A1 Hearing aid wax guard with integral bridge |
| 03/25/1993 | CA2054635A1 Loud speaker with externally adjustable power setting |
| 03/24/1993 | CN1070301A 环绕声处理器 Surround Processor |
| 03/23/1993 | US5197103 Low sound loudspeaker system |
| 03/23/1993 | US5196755 Acoustic transducer device |
| 03/18/1993 | WO1993005623A1 Headset |
| 03/17/1993 | EP0532321A2 Speaker system with detachable horn |
| 03/17/1993 | EP0532280A2 Speaker configuration for TV set |
| 03/17/1993 | EP0531998A2 Speaker unit and covering structure therefor |
| 03/17/1993 | EP0531613A2 Electret condenser microphone unit |
| 03/17/1993 | CN1070071A 便携式声响系统 Portable sound system |
| 03/16/1993 | US5195142 Piezoelectric transducer |
| 03/16/1993 | US5194701 Speaker structure |
| 03/16/1993 | US5194700 Louver structure with movable slats for a loudspeaker box |
| 03/16/1993 | US5194686 Device for electroacoustic amplification of a stringed instrument with a tailpiece |
| 03/16/1993 | CA1314618C Telephone earpiece extension attachment |
| 03/11/1993 | DE4228027A1 Amplifier-loudspeaker casing with independent energy store - is designed for HI-FI operation in car compartment for high performance. |
| 03/10/1993 | EP0530575A1 Horn loudspeaker |
| 03/09/1993 | US5193119 Multiple loudspeaker |
| 03/09/1993 | US5193118 Vehicular sound reproducing |
| 03/09/1993 | US5191697 Loudspeaker damper and method of manufacturing the same |
| 03/04/1993 | WO1993004565A1 Speaker box |
| 03/03/1993 | EP0529143A2 Diaphragm for loudspeaker or microphone |