| Patents for H04R 19 - Electrostatic transducers (5,387) |
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| 12/09/1997 | CA2081038C Electret transducer array and fabrication technique |
| 12/02/1997 | CA2046416C Hearing aid for persons with an impaired hearing faculty |
| 11/27/1997 | WO1997044987A1 Improved microphones for an implantable hearing aid |
| 11/05/1997 | CN1164171A Microphone expansion for background noise reduction |
| 10/28/1997 | US5682075 Porous gas reservoir electrostatic transducer |
| 10/23/1997 | WO1997039464A1 Thin film electret microphone |
| 10/22/1997 | EP0802700A1 Electroacoustic transducer |
| 10/22/1997 | CN2265655Y Active electrodynamic microphone |
| 10/15/1997 | CN2265051Y Socket of plug for handset |
| 10/14/1997 | US5677965 Integrated capacitive transducer |
| 10/08/1997 | EP0800331A2 Integrated microphone/amplifier unit, and amplifier module therefor |
| 09/24/1997 | CN2263429Y Computer megaphone |
| 08/28/1997 | WO1997031506A1 Acoustic element and method for sound processing |
| 08/06/1997 | CN1156389A 话筒 Microphone |
| 07/09/1997 | EP0783238A2 Method for the production and application of annular suspension edges of lound speaker diaphragms |
| 07/03/1997 | WO1997024013A1 Electrostatic loudspeaker |
| 07/03/1997 | CA2241156A1 Electrostatic loudspeaker |
| 06/24/1997 | US5642015 Elastomeric micro electro mechanical systems |
| 05/29/1997 | WO1997019572A1 Method for the production of a system comprising a substrate and a capacitive sensor which is arranged on the substrate |
| 05/28/1997 | EP0775434A1 Acoustic transducer with improved low frequency response |
| 05/06/1997 | US5627903 Variable geometry electromagnetic transducer |
| 03/26/1997 | EP0764387A1 Acoustic transducer |
| 02/04/1997 | US5600610 Electrostatic transducer and method for manufacturing same |
| 01/09/1997 | WO1997001258A1 Micromechanical microphone |
| 12/31/1996 | US5590212 High molecular weight polyethylene terephthalate |
| 12/18/1996 | EP0748576A1 Variable geometry electromagnetic transducer |
| 11/12/1996 | US5573679 Fabrication of a surface micromachined capacitive microphone using a dry-etch process |
| 11/07/1996 | WO1996035313A1 Acoustic vibration generator |
| 11/07/1996 | WO1996034701A1 Elastomeric micro electromechanical systems |
| 11/07/1996 | CA2219234A1 Acoustic vibration generator |
| 10/29/1996 | US5570428 Transducer assembly |
| 09/25/1996 | CN1131856A Baffled mirophone assembly |
| 08/20/1996 | US5548658 Acoustic Transducer |
| 08/08/1996 | DE19503728A1 Electrostatic loudspeaker e.g. for audio equipment |
| 07/23/1996 | US5539834 Baffled microphone assembly |
| 07/17/1996 | EP0629333B1 Electret microphone assembly, and method of manufacture |
| 07/02/1996 | CA2054668C Micromachined differential pressure transducers and method of producing the same |
| 06/19/1996 | CN2229743Y Sensor using for detecting biological characteristic acoustic information |
| 05/08/1996 | EP0711095A2 Baffled microphone assembly |
| 05/08/1996 | EP0710389A1 Acoustic transmitting and receiving unit |
| 05/01/1996 | EP0708689A1 High pressure low impedance electrostatic transducer |
| 04/24/1996 | EP0707781A1 Solid state condenser and microphone devices |
| 04/23/1996 | US5511130 Single diaphragm second order differential microphone assembly |
| 04/10/1996 | EP0705527A1 Folded dielectric film element and method for manufacturing the same |
| 02/22/1996 | WO1996005711A1 Acoustic transducer with improved low frequency response |
| 02/06/1996 | US5490220 Solid state condenser and microphone devices |
| 01/31/1996 | EP0694246A1 A method and a coupling for reducing the harmonic distortion of a capacitive transducer |
| 01/23/1996 | US5486423 SiO2 electrets and process of making it |
| 01/17/1996 | EP0692921A1 Sound pick-up device by an electret microphone |
| 01/03/1996 | CN1114479A Single diaphragm second order differential microphone assembly |
| 12/14/1995 | WO1995034185A1 Acoustic transducer |
| 12/05/1995 | US5473683 Post assembly process for adjusting the gain of an electret microphone within a communications apparatus |
| 11/28/1995 | US5471540 Electrostatic loudspeaker having stationary electrodes formed as multiple sheets insulated from each other |
| 11/16/1995 | WO1995031082A1 Solid state condenser and microphone devices |
| 11/08/1995 | EP0681410A2 Single diaphragm second order differential microphone assembly |
| 10/18/1995 | EP0677977A1 Mounting device for a microphone capsule |
| 10/11/1995 | EP0598729B1 Electret feature, method of producing it, and its use in an electro-acoustic transducer |
| 10/04/1995 | EP0675669A1 Magnetoresistive microphone and acoustic sensing devices |
| 09/27/1995 | EP0673563A1 Pre-amplifier |
| 09/19/1995 | US5452268 Acoustic transducer with improved low frequency response |
| 09/12/1995 | US5450498 High pressure low impedance electrostatic transducer |
| 09/12/1995 | US5450372 Rare earth mixed oxide |
| 09/12/1995 | CA2001724C Electret condenser microphone |
| 06/14/1995 | DE4342169A1 Electromechanical converter such as microphone |
| 04/25/1995 | US5408731 Process for the manufacture of integrated capacitive transducers |
| 04/18/1995 | US5408534 Electret microphone assembly, and method of manufacturer |
| 04/13/1995 | WO1995010166A1 Variable geometry electromagnetic transducer |
| 03/30/1995 | WO1995008905A1 Method for repeating of a sound |
| 03/21/1995 | US5400297 Method and a system for testing capacitive, acoustic transducers |
| 03/09/1995 | DE4329993A1 Electro-acoustic capacitive transducer, particularly an electret capacitor microphone |
| 03/09/1995 | DE4329991A1 Headphones with electrostatic push-pull transducer |
| 03/08/1995 | EP0567535A4 Improved hearing apparatus. |
| 02/21/1995 | US5392358 Electrolytic loudspeaker assembly |
| 02/14/1995 | US5390254 Hearing apparatus |
| 02/07/1995 | US5388163 Electret transducer array and fabrication technique |
| 02/01/1995 | EP0637190A2 Diaphragm for a capacitance type loudspeaker |
| 02/01/1995 | EP0637187A1 Two-way communications earset |
| 01/26/1995 | WO1995002464A1 High pressure low impedance electrostatic transducer |
| 01/26/1995 | CA2159900A1 High pressure low impedance electrostatic transducer |
| 01/19/1995 | WO1995002237A1 Acoustic transmitting and receiving unit |
| 01/10/1995 | US5381299 Capacitive pressure sensor having a substrate with a curved mesa |
| 01/05/1995 | WO1995001079A1 Folded dielectric film element and method for manufacturing the same |
| 12/21/1994 | EP0629333A1 Electret microphone assembly, and method of manufacture. |
| 12/07/1994 | CN2185014Y Portable movable telephone recording adapter |
| 11/30/1994 | CN1026846C Standing pole capacity microphone |
| 11/23/1994 | EP0305540B1 Diaphragm unit of a condenser microphone, a method of fabricating the same, and a condenser microphone |
| 11/08/1994 | US5363452 Microphone for use in a vibrating environment |
| 10/25/1994 | US5357807 Micromachined differential pressure transducers |
| 10/13/1994 | WO1994023547A1 A method and a coupling for reducing the harmonic distortion of a capacitive transducer |
| 09/21/1994 | EP0616485A1 Electrostatic transducer |
| 09/21/1994 | EP0371990B1 Systems and methods for sensing position and movement |
| 08/09/1994 | US5337011 Pre-amplifier |
| 08/02/1994 | US5335286 Electret assembly |
| 08/02/1994 | US5335210 Integrated liquid crystal acoustic transducer |
| 07/27/1994 | EP0608162A1 SiO2 electret and its manufacturing process |
| 06/23/1994 | WO1994014239A1 Pre-amplifier |
| 06/08/1994 | CN1087770A Electrolytic loudspeaker assembly |
| 06/01/1994 | EP0598729A1 Electret feature, method of producing it, and its use in an electro-acoustic transducer. |
| 05/11/1994 | EP0596456A1 Method of manufacturing an integrated capacitive transductor |
| 05/04/1994 | EP0595221A1 Electrostatic loudspeaker system |