| Patents for H04R 13 - Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet (404) |
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| 01/25/2006 | CN2754302Y High-stable loudspeaker T-shape iron |
| 01/18/2006 | CN1237847C Electro-acoustic transducer |
| 12/08/2005 | US20050270906 Resonator device and circuits for 3-d detection/receiving sonic waves, even of a very low amplitude/frequency, suitable for use in cybernetics |
| 11/30/2005 | CN1229771C Electromagnetic sounder |
| 11/17/2005 | US20050254672 Bone conductive speaker |
| 10/06/2005 | DE102005011664A1 Mehrfunkions-Lautsprecher Mehrfunkions speakers |
| 10/05/2005 | EP1224838A4 Electromagnetic transducer and portable communication device |
| 09/22/2005 | US20050207610 Multifunction speaker |
| 09/21/2005 | CN1671251A Multifunction speaker |
| 08/17/2005 | CN1656849A Bone conductive speaker |
| 07/28/2005 | WO2005069586A1 Portable telephone using bone conduction device |
| 07/28/2005 | CA2535671A1 Portable telephone using bone conduction device |
| 07/19/2005 | US6920230 Electromagnetic transducer and portable communication device |
| 06/21/2005 | US6907955 Electromagnetic electroacoustic transducer |
| 06/02/2005 | DE10052151B4 Vibrationslautsprecher Vibration speaker |
| 03/16/2005 | EP1515580A1 Bone conductive speaker |
| 02/08/2005 | US6853735 Receiver and portable communication device |
| 02/02/2005 | CN1187732C Surface assembling type electromagnetic sound-producing device |
| 01/12/2005 | CN1184851C Electro-acoustic transducer and its producing method |
| 01/05/2005 | CN1183801C Bone conduction transducer and bone conduction speaker headset therewith |
| 12/15/2004 | EP1486094A2 Resonator device and associated circuits |
| 10/26/2004 | US6809634 Buzzer-driving apparatus |
| 10/19/2004 | US6807283 Electroacoustic transducer |
| 10/07/2004 | US20040194285 Electro-acoustic transducer and method of manufacturing the same |
| 09/22/2004 | CN1168067C Electroacoustic transducer and method of manufacture thereof |
| 09/08/2004 | CN1165886C Connector for sounder |
| 09/01/2004 | CN1165202C Electromagnetic transducer and portable communication device |
| 08/31/2004 | US6783370 Connecting member for a sound generator |
| 08/25/2004 | CN1163867C Electromagnetic electroacoustic transducer |
| 08/04/2004 | CN1160870C Vibrating loudspeaker |
| 06/17/2004 | US20040113526 Electromechanical transducer and method for transforming energies |
| 05/26/2004 | CN1499483A 电磁声电变换器 Electromagnetic acoustic-electric transducer |
| 05/26/2004 | CN1151702C Electromagnetic voice converter |
| 05/06/2004 | US20040084417 Clad material for lead wire connection |
| 05/06/2004 | US20040084242 Electromagnetic electroacoustic transducer |
| 04/15/2004 | WO2003079725A3 Resonator device and associated circuits |
| 04/06/2004 | US6717305 Apparatus having an electroacoustic transducer forming a sound reproducing means and a part of vibration generating means |
| 03/24/2004 | CN1143594C Miniature electro-acoustic converter |
| 03/17/2004 | CN1482835A Stealth and miniature wireless earphone |
| 03/10/2004 | CN1141857C Electroacoustic transducer |
| 02/11/2004 | CN1138446C Electricity-sound transducer lead-wire terminal connection structure |
| 01/28/2004 | EP1384388A1 Electromechanical transducer and method for transforming energies |
| 01/13/2004 | US6678388 Electroacoustic transducer |
| 01/07/2004 | CN2598291Y Plane serial magnetic circuit and electricity-machinery-sound transducer |
| 01/06/2004 | US6671952 Method of lead wire connection |
| 12/30/2003 | US6671383 Electromagnetic transducer and portable communication device |
| 12/24/2003 | CN1132500C Electromagnetic acoustic transducer |
| 12/23/2003 | US6668067 Electroacoustic transducer |
| 12/23/2003 | US6668065 Bone-conduction transducer and bone-conduction speaker headset therewith |
| 12/10/2003 | CN1130952C Electroacoustic transducer |
| 12/04/2003 | WO2003101146A1 Bone conductive speaker |
| 12/04/2003 | CA2487391A1 Bone conductive speaker |
| 11/25/2003 | US6654478 Electroacoustic transducer |
| 11/19/2003 | CN1128564C Method of ultrasonic welding for resin-case |
| 11/05/2003 | CN1127284C Sounder |
| 10/29/2003 | CN1126428C Electro-acoustic conversion device |
| 10/15/2003 | CN1124771C Electroacoustic transducer |
| 10/09/2003 | WO2003084285A1 Sound-to-vibration conversion apparatus |
| 10/01/2003 | CN1122960C Sound generator for portable device |
| 09/30/2003 | US6628800 Electroacoustic transducer and method for manufacturing the same |
| 09/25/2003 | WO2003079725A2 Resonator device and associated circuits |
| 09/24/2003 | CN2575908Y User/relay switching interface circuit |
| 08/27/2003 | CN1119790C Electromagnetic sound generator |
| 07/29/2003 | US6600400 Electromagnetic electro-acoustic transducer |
| 07/03/2003 | US20030123691 Electromagnetic transducer and protable communication device |
| 07/01/2003 | US6587397 Electroacoustic transducer |
| 06/18/2003 | CN1425264A Bone conduction transducer and bone conduction speaker headset therewith |
| 05/28/2003 | CN1110225C Terminal connection method of coil and terminal connection structure of coil |
| 05/21/2003 | CN1419395A 电声换能器 Electro-acoustic transducer |
| 05/08/2003 | US20030086584 Electroacoustic transducer |
| 05/08/2003 | US20030084562 Manufacturing method for electroacoustic transducer |
| 04/16/2003 | CN1106134C Mfg. method of electromagnetic sound converter |
| 03/13/2003 | US20030048913 Bone-conduction transducer and bone-conduction speaker headset therewith |
| 03/04/2003 | US6529107 Speaker comprising ring magnet |
| 01/15/2003 | EP1275268A1 Bone-conduction transducer and bone-conduction speaker headset therewith |
| 12/31/2002 | US6501845 Electroacoustic transducer |
| 12/10/2002 | US6492899 Electromagnetic converter having superior anti-shock property |
| 12/05/2002 | US20020180593 Buzzer-driving apparatus |
| 11/26/2002 | US6487300 Vibration speaker |
| 11/21/2002 | WO2002093976A1 Sound-to-vibration conversion apparatus |
| 11/13/2002 | CN1379389A Electromagnetic sound generating apparatus |
| 10/30/2002 | EP1253044A2 Buzzer driving apparatus |
| 10/30/2002 | CN1377025A Lead wire connecting structure and method and coating materials used in lead wire connection |
| 10/24/2002 | WO2002085065A1 Electromechanical transducer and method for transforming energies |
| 10/03/2002 | US20020142795 Receiver and portable communication device |
| 10/02/2002 | CN2514606Y Flat vibrating diaphragm loudspeaker |
| 10/02/2002 | CN1372781A Electromagnetic transducer and portable communication device |
| 09/26/2002 | US20020136424 Electromagnetic transducer and portable communication device |
| 09/18/2002 | EP1241920A2 Electromagnetic sound producing device. |
| 09/12/2002 | US20020126868 Electromagnetic sound producing device |
| 08/29/2002 | WO2000027166A9 Transducer concepts for hearing aids and other devices |
| 08/29/2002 | US20020117327 Structure and method of lead wire connection, and clad material for lead wire connection |
| 08/13/2002 | US6433674 Electromagnetic sound generator |
| 08/07/2002 | CN1362895A Apparatus having an electroacoustic transducer forming sound reproducing means and part of vibration generating means |
| 07/24/2002 | EP1224838A1 Electromagnetic transducer and portable communication device |
| 07/17/2002 | CN1359251A Electro-acustic transducer |
| 07/10/2002 | CN1087584C Method for mfg. of electromagnetic sound converter |
| 07/10/2002 | CN1087583C Method of fabricating electroacoustic transducer |
| 06/20/2002 | US20020076079 Electroacoustic transducer |
| 06/20/2002 | US20020075110 Speaker comprising ring magnet |