| Patents for H04R 7 - Diaphragms for electromechanical transducers; Cones (6,555) |
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| 07/22/2004 | WO2004062318A1 Membrane for acoustic transducers |
| 07/22/2004 | DE10300063A1 Membran für akustische Wandler Membrane for acoustic transducer |
| 07/21/2004 | EP1439731A1 An electroacoustic transducer |
| 07/21/2004 | CN1158896C Apparatus including electroacoustic transducer having terminal contacts which extend in the direction of the transducer axis and including printed circuit board having mating contacts |
| 07/20/2004 | US6766034 Multifunction acoustic device |
| 07/20/2004 | US6764046 Ceiling speaker system of aircraft |
| 07/14/2004 | EP1437030A1 An electro-acoustic transducer with two diaphragms |
| 07/14/2004 | CN1513279A Production of non-planar membranes for electroacoustic converters |
| 07/14/2004 | CN1512821A Non pulp base material speaker sound cone and its producing process |
| 07/14/2004 | CN1158000C Electrostatic transducer with nonplanar configurated diaphragm |
| 07/14/2004 | CN1157999C Acoustic device |
| 07/14/2004 | CN1157998C Panel form acoustic apparatus using bending waves modes |
| 07/14/2004 | CN1157997C Method for producing acoustic device, speaker drive unit and speaker |
| 07/14/2004 | CN1157996C Method for producing acoustic device and acoustic device comprising a panel member |
| 07/08/2004 | WO2004057912A2 Acoustic actuators |
| 07/08/2004 | WO2004057911A1 Method and device for converting energy between membranes |
| 07/08/2004 | US20040131221 Speaker surround and method for producing the same |
| 07/08/2004 | US20040131195 Device and method to adapt a hearing device |
| 07/08/2004 | US20040129492 Planar diaphragm loudspeaker and related methods |
| 07/07/2004 | CN1157088C Multifunctional music centre apparatus |
| 07/06/2004 | US6760461 Vehicle loudspeaker |
| 07/06/2004 | US6760454 Passive voice-activated microphone and transceiver system |
| 07/06/2004 | US6759769 Dielectric film intended for transforming electric energy into mechanical energy or vice versa |
| 07/01/2004 | WO2004006623A3 Multilayer loudspeaker diaphragm |
| 07/01/2004 | US20040125981 Electroacoustic transducer |
| 07/01/2004 | US20040125980 Electromagnetic transducer with asymmetric diaphragm |
| 07/01/2004 | US20040125971 Combination loudspeaker unit |
| 06/30/2004 | EP1433356A2 Loudspeaker |
| 06/30/2004 | CN1156197C Horn-type loudspeaker system |
| 06/29/2004 | US6757404 Loud speaker, diaphragm and process for making the diaphragm |
| 06/29/2004 | US6757399 Anti-noise-electret pick-up with an electret |
| 06/24/2004 | WO2004054317A1 Slider mobile telephone comprising a bending wave loudspeaker |
| 06/24/2004 | US20040120543 Structure improvement for speaker unit |
| 06/24/2004 | US20040120542 Loudspeaker with a bellow-shaped surround |
| 06/23/2004 | CN1507766A Loudspeaker and method of making same |
| 06/23/2004 | CN1507302A Loudspeaking device |
| 06/22/2004 | US6752906 Loudspeaker and method for the preparation thereof |
| 06/17/2004 | WO2004052046A2 Thin membrane transducer |
| 06/17/2004 | US20040114777 Electroacoustic conversion of audio signals, especially voice signals |
| 06/17/2004 | US20040114774 Sound reproduction system |
| 06/17/2004 | US20040112672 Loudspeaker diaphragm and method for manufacturing the same |
| 06/17/2004 | US20040112671 Loudspeaker unit and assembly |
| 06/16/2004 | EP1429582A2 Loudspeaker diaphragm and method for manufacturing the same |
| 06/15/2004 | US6751333 Inertial vibration transducers |
| 06/15/2004 | US6751332 Speaker |
| 06/15/2004 | US6751329 Loudspeaker driver |
| 06/10/2004 | WO2004049757A1 An apparatus for energy transfer in a balanced receiver assembly and manufacturing method thereof |
| 06/10/2004 | WO2004049756A1 An apparatus for creating acoustic energy in a balance receiver assembly and manufacturing method thereof |
| 06/10/2004 | WO2004049751A1 Loudspeaker |
| 06/10/2004 | US20040109582 Speaker device |
| 06/09/2004 | EP1427249A1 Voice coil of speaker |
| 06/09/2004 | EP1427248A2 Speaker device |
| 06/09/2004 | EP1425937A2 Acoustic device |
| 06/09/2004 | EP1033062B1 Telescoping loudspeaker having multiple coaxial voice coils |
| 06/08/2004 | US6748090 Multi-mode radiator panels |
| 06/08/2004 | US6745867 Loudspeaker drive unit |
| 06/03/2004 | WO2004047487A1 Electroacoustic transducer comprising a membrane with a middle area comprising stiffening grooves |
| 06/03/2004 | DE202004003240U1 Loudspeaker body especially loudspeaker housing with two plane surface elements, has acoustic radiator assigned to one of surface elements, especially one part of surface element |
| 06/02/2004 | EP1424872A1 Device with bending waves loudspeaker and coupling element for external acoustic transducing surfaces |
| 06/02/2004 | CN1502214A Electroacoustic transducer comprising a membrane with an improved pleats area |
| 06/02/2004 | CN1152598C Electronic apparatus |
| 06/01/2004 | US6742622 Injection molding of foaming agent-containing resin having three-layered structure |
| 06/01/2004 | CA2229858C Inertial vibration transducers |
| 05/27/2004 | US20040101149 Planar type speaker and system using it |
| 05/26/2004 | CN2618398Y Improved elastical wave structure |
| 05/26/2004 | CN1500365A Planar-magnetic speakers with secondary magnetic structure |
| 05/26/2004 | CN1500364A Loudspeaker |
| 05/26/2004 | CN1151701C Electrodynamic loudspeaker and system comprising loudspeaker |
| 05/25/2004 | US6740202 Formed from a material combining a fiber- type material and a ceramic-type-coating agent including metal alkoxide, metal hydroxide, and a colloidal fine parataiculate inorganic substance |
| 05/21/2004 | WO2004043113A1 Portable electronic apparatus with diaphragm type speaker |
| 05/20/2004 | US20040094357 Method for manufacturing diaphragm for loudspeaker, diaphragm for loudspeaker made thereby, and loudspeaker using the same |
| 05/20/2004 | US20040094356 Application of primer after corona discharge, and surface treatment of the loudspeaker diaphragm by the gas plasma treatment method using parallel flat electrodes |
| 05/19/2004 | EP1420609A1 Flat speaker of full-face driving |
| 05/19/2004 | EP1419673A2 Loudspeaker with a three-dimensional diaphragm |
| 05/19/2004 | CN2617109Y Loudspeaker brake board |
| 05/19/2004 | CN1498018A Voice generator |
| 05/18/2004 | US6738489 Vibration speaker |
| 05/18/2004 | US6738484 Pressure responsive device and method of manufacturing semiconductor substrate for use in pressure responsive device |
| 05/13/2004 | WO2003098964A3 Transducer |
| 05/12/2004 | EP0976301B1 An electroacoustic transducer and a diaphragm for an electroacoustic transducer |
| 05/12/2004 | CN2615988Y 改良的弹波结构 Improved bomb wave structure |
| 05/12/2004 | CN1496663A Device and method for manufacturing speaker diaphragem, diaphragm made from said method, and speaker |
| 05/12/2004 | CN1496662A Speaker surround structure for maximizing cone diameter |
| 05/12/2004 | CN1496192A Laudspeaker unit and its assembly |
| 05/12/2004 | CN1496191A Laudspeaker combined component |
| 05/12/2004 | CN1496190A Border for loudspeaker vibrating membrane and its making method |
| 05/12/2004 | CN1496189A Miniature all sound interval laudspeaker |
| 05/11/2004 | US6735323 Speaker |
| 05/06/2004 | WO2004039124A1 Suspension and electro-acoustic transducer using the suspension |
| 05/06/2004 | US20040086149 One-magnet rectangular transducer |
| 05/06/2004 | US20040086146 Magnetic circuit for speaker, method of manufacture thereof, and speaker using same |
| 05/06/2004 | US20040086143 Speaker surround structure for maximizing cone diameter |
| 05/06/2004 | EP1416763A1 Magnetic circuit for speaker, method of manufacture thereof, and speaker incorporating same |
| 05/06/2004 | EP1036484B1 Resonant mode panel-loudspeakers |
| 05/06/2004 | DE19921210B4 Verfahren zur Herstellung von Membranen für die Verwendung in elektroakustischen Wandlern Process for the preparation of membranes for use in electroacoustic transducers |
| 05/06/2004 | DE10246792A1 Acoustic device for radiating sound waves, has panel with wooden core with high modulus of elasticity coating, e.g. resin and textile material; light wood mean raw density less than 400 kg/cubic meter |
| 05/05/2004 | CN2614408Y High pitch loudspeaker with annular diaphragm |
| 05/05/2004 | CN1494354A Improved vibration membrane base material construction unit of loudspeaker and its manufacturing method |
| 05/05/2004 | CN1148994C Loudspeaker |
| 05/05/2004 | CN1148993C Supporter of sound body |