| Patents for H04R 19 - Electrostatic transducers (5,387) |
|---|
| 02/16/2000 | EP0979992A1 Micromechanical sensor |
| 02/08/2000 | US6023123 Acoustic vibration generator |
| 02/03/2000 | WO2000005922A1 An anti-noise-electret pick-up |
| 02/03/2000 | WO2000005001A1 Method of manufacturing a capacitive ultrasound transducer |
| 02/03/2000 | CA2304318A1 An anti-noise-electret pick-up |
| 01/20/2000 | WO2000003560A2 Method for producing a filled recess in a material layer, integrated circuit produced using said method |
| 01/13/2000 | WO2000002417A1 Resonant panel-form loudspeaker |
| 01/13/2000 | CA2336271A1 Resonant panel-form loudspeaker |
| 01/06/2000 | WO2000001195A2 Electrostatic speaker with foam stator |
| 01/06/2000 | WO2000001194A2 Electrostatic speaker with moveable diaphragm edges |
| 01/05/2000 | EP0969695A1 System consisting of a microphone and a preamplifier |
| 01/05/2000 | EP0969694A2 Pressure transducer and manufacturing method thereof |
| 12/16/1999 | WO1999065277A1 A method of manufacturing a transducer having a diaphragm with a predetermined tension |
| 12/15/1999 | EP0963683A1 Improved microphones for an implantable hearing aid |
| 12/09/1999 | WO1999063652A1 Solid-state receiver |
| 12/08/1999 | CN1047107C Elastmeric micro electromechanical system |
| 12/07/1999 | CA2218876C Elastomeric micro electro mechanical systems |
| 11/24/1999 | EP0959643A2 Acoustic wave transducer device |
| 11/24/1999 | CN1236287A Capacitive speaker composed of plastic and conductive liquid and its producing method |
| 11/18/1999 | WO1999059172A1 Thin electret layer and corresponding production method |
| 11/18/1999 | CA2271787A1 Acoustic wave transducer device |
| 11/17/1999 | CN2349736Y Electrostatic loudspeaker using insulating-board plated metal on back side as electrode |
| 11/10/1999 | CN1234715A Digital electroacoustic transducer |
| 11/04/1999 | WO1999056498A1 Acoustic element |
| 11/04/1999 | CA2330377A1 Acoustic element |
| 11/02/1999 | US5978491 Circuitry for improving performance of electret microphone |
| 10/27/1999 | CN2346131Y Electret anti-noise acoustical pick-up |
| 09/15/1999 | CN1228837A Micromechanical sensor |
| 09/08/1999 | EP0939888A1 Micromechanical sensor |
| 08/19/1999 | DE19900969A1 Slot microphone |
| 08/18/1999 | EP0936837A2 Electroacoustic transducer of digital type |
| 08/18/1999 | CN2334130Y Miniature one-way electret microphone body |
| 08/17/1999 | US5940520 Power circuit for condenser microphone |
| 08/04/1999 | EP0707781B1 Solid state condenser and microphone devices |
| 07/15/1999 | WO1999035884A1 Sonic emitter with foam stator |
| 07/15/1999 | CA2317631A1 Sonic emitter with foam stator |
| 06/24/1999 | WO1999031933A1 Implantable microphone having improved sensitivity and frequency response |
| 06/23/1999 | CN2325948Y Function assembling type electrostatic loud-speaker |
| 05/06/1999 | DE19741046C1 Single chip microphone is produced using only three photolithographic masking steps |
| 04/08/1999 | DE19742249A1 Microphone, especially studio- and recording microphone |
| 04/07/1999 | CN2313348Y Balanced-output micro eletret capacitor microphone |
| 03/30/1999 | US5889872 Capacitive microphone and method therefor |
| 03/24/1999 | EP0903058A1 Electroacoustic transducer |
| 03/23/1999 | CA2157263C Baffled microphone assembly |
| 03/18/1999 | DE19839978A1 Sound measurement transducer for semiconducting electret microphone for portable telephone |
| 03/09/1999 | US5881158 Microphones for an implantable hearing aid |
| 02/23/1999 | CA2197197C Acoustic transducer with improved low frequency response |
| 02/18/1999 | WO1999008479A1 Sound radiating devices/systems |
| 02/18/1999 | CA2295724A1 Sound radiating devices/systems |
| 02/17/1999 | CN2308214Y Microphone for interview |
| 02/09/1999 | US5870482 Miniature silicon condenser microphone |
| 01/20/1999 | CN1205829A Electrostatic loudspeaker |
| 01/19/1999 | US5862239 Directional capacitor microphone system |
| 01/12/1999 | CA2143226C Single diaphragm second order differential microphone assembly |
| 01/06/1999 | CN2303420Y Flexible extending tube for communication mouthpiece |
| 12/29/1998 | US5854846 Wafer fabricated electroacoustic transducer |
| 12/17/1998 | WO1998057522A1 Electrolytic loudspeaker assembly |
| 12/16/1998 | EP0883972A1 Acoustic element and method for sound processing |
| 12/10/1998 | WO1998035529A3 Elastomeric dielectric polymer film sonic actuator |
| 12/09/1998 | EP0883326A2 Transformer for piezoelectric speaker and piezoelectric speaker operative with said transformer |
| 12/01/1998 | CA2060542C Electret capacitor microphone |
| 11/18/1998 | CN2297828Y Two channel microphone koraoke single power supply power amplification computer sound card |
| 10/21/1998 | EP0872153A1 Micromechanical microphone |
| 10/20/1998 | US5825718 Underwater communication apparatus and underwater microphone, and closed-type sound converter |
| 09/16/1998 | EP0864246A1 Electrostatic loudspeaker |
| 09/16/1998 | CN2291767Y Microphone line twisting-free device |
| 09/15/1998 | US5809155 Assembling structure for capacitor microphone |
| 09/09/1998 | EP0764387B1 Acoustic transducer |
| 09/02/1998 | CN2290161Y 无线传声器 Wireless microphone |
| 09/01/1998 | US5802198 Hermetically sealed condenser microphone |
| 08/27/1998 | WO1998037388A1 Miniature silicon condenser microphone |
| 08/13/1998 | WO1998035529A2 Elastomeric dielectric polymer film sonic actuator |
| 08/12/1998 | CN2287769Y Microphone and mainframe split hearing aid |
| 07/08/1998 | EP0589974B1 A method and a system for testing capacitive acoustic transducers |
| 07/08/1998 | CN2285947Y Wireless microphone |
| 07/02/1998 | WO1998010252A3 Wafer fabricated electroacoustic transducer |
| 07/02/1998 | DE19724491A1 Microphone for electric hearing aid |
| 07/01/1998 | CN1186458A Elastmeric micro electromechanical systems |
| 06/25/1998 | DE19648424C1 Mikromechanischer Sensor Micromechanical sensor |
| 06/04/1998 | WO1998023934A1 Micromechanical sensor |
| 05/27/1998 | CN1183019A Magnetic shielding electrodynamic microphone for head-holding type earphone microphone set |
| 05/26/1998 | US5757090 Folded dielectric film element and method for maufacturing the same |
| 05/20/1998 | DE19641503A1 Electrostatic loudspeaker with optional circular radiation characteristic |
| 05/05/1998 | US5748567 Acceleration sensor |
| 04/29/1998 | CN2280397Y Rotary type frequency response modulation loudspeaker |
| 04/29/1998 | CN2280396Y Microphone with or without wire |
| 04/28/1998 | US5745438 Electrostatic transducer and method for manufacturing same |
| 03/25/1998 | CN2277154Y Muting device of microphone |
| 03/12/1998 | WO1998010252A2 Wafer fabricated electroacoustic transducer |
| 03/12/1998 | CA2268053A1 Wafer fabricated electroacoustic transducer |
| 03/04/1998 | CN2275780Y Magnetic circuit apparatus for loudspeaker |
| 02/25/1998 | EP0824844A1 Acoustic vibration generator |
| 02/25/1998 | EP0824381A1 Elastomeric micro electromechanical systems |
| 02/18/1998 | CN2274855Y Microphone with special sounding effect |
| 02/04/1998 | CN2273937Y Capacity type electret microphone |
| 01/21/1998 | CN2273085Y Sound head of receiver with inlaid cover |
| 01/07/1998 | EP0710389B1 Acoustic transmitting and receiving unit |
| 12/29/1997 | EP0708689B1 High pressure low impedance electrostatic transducer |
| 12/18/1997 | WO1997048253A1 Electroacoustic transducer |
| 12/18/1997 | CA2257447A1 Electroacoustic transducer |