| Patents for H04R 23 - Transducers other than those covered by groups (1,562) |
|---|
| 11/07/2002 | WO2002089523A1 Device for detecting pressure fluctuations, display device, recording device and sound reproduction system |
| 11/07/2002 | US20020164043 Directional optical microphones |
| 10/31/2002 | WO2002087279A2 Matching an acoustic driver to an acoustic load in an acoustic resonant system |
| 10/31/2002 | WO2002087278A2 Optical microphone construction |
| 10/31/2002 | CA2444440A1 Matching an acoustic driver to an acoustic load in an acoustic resonant system |
| 10/24/2002 | WO2001059852A9 Monolithic electroactive polymers |
| 10/17/2002 | WO2002082858A2 Sound and vision system |
| 10/15/2002 | US6466674 Method and apparatus for eliminating audio feedback |
| 10/10/2002 | WO2002080616A2 Optical microphone for communication devices |
| 10/09/2002 | EP1247421A1 Piezoelectric film sonic emitter |
| 10/02/2002 | EP1246502A1 Microphone |
| 10/02/2002 | EP0864107B1 Low frequency underwater sound source |
| 10/01/2002 | US6459798 Sound-collecting device |
| 09/26/2002 | WO2002076142A2 Phanton power optical microphone system |
| 09/26/2002 | WO2002076141A2 Magnetostrictive actuator |
| 09/11/2002 | EP1239699A1 Microphone utilizing optical signal |
| 09/11/2002 | EP1239698A1 Optical acoustoelectric transducer |
| 09/06/2002 | WO2002037601A3 Antenna unit for cellular telephones |
| 09/05/2002 | US20020122561 Elastomeric dielectric polymer film sonic actuator |
| 09/05/2002 | US20020121016 Microphone utilizing optical signal |
| 08/29/2002 | WO2002066939A1 Displacement/quantity of light converter |
| 08/28/2002 | EP1235463A1 Acoustoelectric transducer using optical device |
| 08/22/2002 | WO2002065812A1 Vibration detector |
| 08/22/2002 | WO2001006579A8 Pre-strained electroactive polymers |
| 08/22/2002 | US20020114477 Directional optical mircophone |
| 08/13/2002 | US6434252 Ribbon microphone |
| 08/13/2002 | US6434245 Compound electrolytic loudspeaker assembly |
| 07/30/2002 | US6427014 Microphone |
| 07/25/2002 | US20020097636 Folded sagnac sensor array |
| 07/18/2002 | US20020094096 Opitical microphone/sensors |
| 07/18/2002 | US20020094093 Sound Collector |
| 07/17/2002 | EP1103162B1 Infrared helmet |
| 07/10/2002 | EP1221180A2 Electroactive polymers |
| 07/09/2002 | US6418547 Internal guardband for semiconductor testing |
| 07/04/2002 | US20020085727 Communication helmet |
| 07/03/2002 | EP1218716A1 Unitary transducer control system |
| 06/27/2002 | WO2002051202A1 Electromechanical transducer and method for manufacturing an electromechanical transducer |
| 06/27/2002 | US20020080991 Universal ribbon element-module for two or more membrane-widths with optimized flow and drive |
| 06/27/2002 | US20020080986 Microphone (P507) |
| 06/27/2002 | US20020080983 Optical microphone element and optical microphone |
| 06/27/2002 | US20020080982 Sound-collecting device |
| 06/27/2002 | US20020080241 Video camera with microphone |
| 06/27/2002 | US20020079437 Sound-collecting device |
| 06/26/2002 | EP1216602A2 Mems digital-to-acoustic transducer with error cancellation |
| 06/25/2002 | US6408496 Method of manufacturing a vibrational transducer |
| 06/20/2002 | US20020076070 Speaker |
| 06/19/2002 | EP1215936A2 Speaker |
| 06/13/2002 | WO2002047434A2 Optical microphone system and a method for forming same |
| 06/12/2002 | EP1212800A1 Improved electroactive polymers |
| 06/06/2002 | DE10058698A1 Electro-dynamic vacuum flat loudspeaker, has an oscillation coil, a magnetic system with permanent magnets and a metal plate with low retentivity fitted to allow like poles of magnetic plates to point to it. |
| 06/05/2002 | EP1013142A4 Electrohydraulic pressure wave projectors |
| 06/05/2002 | CN1352867A IEEE 1394 cable connector with short circuit switch |
| 06/04/2002 | US6397972 Loudspeakers |
| 05/23/2002 | DE10054247A1 Betätigungselement und Verfahren zu seiner Herstellung Actuating element and process for its preparation |
| 05/21/2002 | US6393129 Paper structures for speaker transducers |
| 05/16/2002 | WO2002039053A1 Fine displacement detection device by sound or the like |
| 05/16/2002 | WO2001059852B1 Monolithic electroactive polymers |
| 05/16/2002 | US20020057818 Speaker apparatus |
| 05/10/2002 | WO2002037660A1 Actuating member and method for producing the same |
| 05/10/2002 | WO2002037601A2 Antenna unit for cellular telephones |
| 05/10/2002 | WO2002001912A3 Optical microphone/sensor |
| 05/07/2002 | US6384550 Speaker and drive device therefor |
| 05/02/2002 | US20020051553 Microphone |
| 05/02/2002 | US20020050769 Electroactive polymer electrodes |
| 04/25/2002 | WO2002034009A2 Optical heads for optical microphone/sensors |
| 04/25/2002 | US20020048373 Optical microphone portable telephone |
| 04/23/2002 | US6378089 Internal guardband for semiconductor testing |
| 04/23/2002 | US6376971 Electroactive polymer electrodes |
| 04/17/2002 | CN1345525A Bending wave loudspeakers |
| 04/10/2002 | CN1344480A Compound electrolytic loudspeaker assembly |
| 03/28/2002 | WO2001093631A3 Transducer with semiconducting membrane |
| 03/27/2002 | EP1191812A1 Optical microphone/sensors |
| 03/27/2002 | EP1191811A1 Directional optical microphones |
| 03/21/2002 | WO2002023947A1 Directional optical microphones |
| 03/20/2002 | EP1189482A1 Membrane for optical microphone/sensor |
| 03/20/2002 | EP1188348A2 Microfabricated transducer and method for making the same |
| 03/14/2002 | US20020029925 Loudspeakers |
| 03/07/2002 | WO2001058973A3 Energy efficient electroactive polymers and electroactive polymer devices |
| 03/06/2002 | CN1339237A Sound generator with a pump actuator |
| 03/06/2002 | CN1339138A Surface acoustic wave converter and identification system using the same |
| 02/28/2002 | US20020026610 Internal guardband for semiconductor testing |
| 02/27/2002 | EP1181837A1 Ieee 1394 cable connector with short circuit switch |
| 02/21/2002 | WO2001059852A3 Monolithic electroactive polymers |
| 02/21/2002 | US20020021813 Optical microphone |
| 02/19/2002 | US6347766 Method and apparatus for generating propulsive forces without the ejection of propellant |
| 02/13/2002 | EP1179283A2 Bending wave loudspeakers |
| 02/06/2002 | EP1178456A2 A passive voice-activated microphone and transceiver system |
| 01/31/2002 | WO2001020948A3 Mems digital-to-acoustic transducer with error cancellation |
| 01/31/2002 | WO2001006579A3 Pre-strained electroactive polymers |
| 01/29/2002 | US6343129 Elastomeric dielectric polymer film sonic actuator |
| 01/24/2002 | US20020008445 Energy efficient electroactive polymers and electroactive polymer devices |
| 01/03/2002 | WO2002001912A2 Optical microphone/sensor |
| 01/02/2002 | EP1168884A1 Optical microphone sensor |
| 12/27/2001 | US20010055397 Parametric virtual speaker and surround-sound system |
| 12/27/2001 | US20010055385 Optical microphone |
| 12/19/2001 | EP1163632A1 Surface acoustic wave converter and identification system using the same |
| 12/06/2001 | WO2001093631A2 Transducer with semiconducting membrane |
| 12/06/2001 | DE10026474A1 Wandler mit halbleitender Membran Converter with semi-conducting membrane |
| 11/28/2001 | CN1324526A Method and device for developing a virtual speaker distant from the sound source |
| 11/22/2001 | US20010043378 Echo-cancelling optical microphone |