| Patents for H04R 13 - Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet (404) |
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| 09/18/2014 | WO2014141193A1 Electromagnetic transducer with specific internal geometry |
| 04/23/2014 | CN103747401A A sandwich vibrating-armature receiver |
| 04/22/2014 | US8705789 Magnet-less loudspeaker |
| 04/16/2014 | CN102355617B Moving-iron unit for loudspeaking device |
| 12/19/2013 | WO2013185410A1 Tablet computer support sound box |
| 10/02/2013 | CN203225881U A sounder |
| 08/14/2013 | CN203136158U Magnetism-driven mechanism for balanced armature type telephone receiver |
| 07/24/2013 | CN103220609A Magnetic driving mechanism for balanced armature telephone receiver |
| 07/03/2013 | CN203039899U Sounding device |
| 07/03/2013 | CN203039898U Sounding device |
| 06/19/2013 | CN203015114U Magnetic circuit system and loudspeaker employing same |
| 05/14/2013 | CA2670508C Electromagnetic ultrasonic transducer and array thereof |
| 05/08/2013 | CN103096224A Moving-magnetic type speaker |
| 04/17/2013 | CN103052016A Integral vibrating diaphragm and preparation method thereof and moveable iron unit provided with integral vibrating diaphragm |
| 04/03/2013 | CN103024649A Sound production device |
| 04/03/2013 | CN103024648A Sound production device |
| 02/21/2013 | WO2013023413A1 Moving iron unit for speaker device |
| 02/20/2013 | CN101536544B Sound converter with enclosure |
| 11/28/2012 | CN101253804B Speaker, image element protective screen, case of terminal, and terminal |
| 11/07/2012 | CN202524555U High-performance automobile horn with adjustable volume |
| 10/10/2012 | CN202488700U Miniature sounding device |
| 08/16/2012 | WO2012109261A1 Wear-tolerant electromagnetic acoustic transducer for use with electromagnetic acoustic resonance inspection techniques |
| 07/11/2012 | CN102572659A High-performance automobile horn capable of adjusting volume |
| 07/04/2012 | CN202310088U 电声换能器结构 Electro-acoustic transducer structure |
| 06/28/2012 | WO2012085350A1 Thin loudspeaker construction. |
| 05/16/2012 | CN102461200A Vibration earphone |
| 05/10/2012 | DE102010043560A1 Mikrophon unter Verwendung eines magnetoelastischen Effekts Microphone using a magnetoelastic effect |
| 04/25/2012 | CN102428712A 骨传导耳机 Bone conduction headphones |
| 04/05/2012 | WO2012042572A1 Vibration detection device |
| 04/04/2012 | CN202183866U 用于扬声装置的动铁单元 Iron unit for speaker apparatus |
| 03/15/2012 | US20120063631 Method for manufacturing spiral coil, the spiral coil, and electro-magnetic acoustic transducer including the same |
| 02/15/2012 | CN102355617A Moving-iron unit for loudspeaking device |
| 12/08/2011 | US20110299703 Miniature transducer assembly with integrated de-coupling coils |
| 09/14/2011 | CN102187689A Methods and apparatus for reduced distortion balanced armature devices |
| 06/08/2011 | EP2329657A2 Methods and apparatus for reduced distortion balanced armature devices |
| 05/25/2011 | EP2325875A1 Semiconductor device |
| 12/29/2010 | WO2010126251A3 Bone conduction headphones |
| 12/29/2010 | WO2010110556A3 Bone conduction speaker |
| 12/16/2010 | WO2010143806A1 Vibration earphone |
| 11/04/2010 | WO2010126251A2 Bone conduction headphones |
| 09/30/2010 | WO2010110556A2 Bone conduction speaker |
| 06/17/2010 | WO2010025351A3 Methods and apparatus for reduced distortion balanced armature devices |
| 06/02/2010 | CN1253463B Electromagnetic transducer and portable communication equipment |
| 05/12/2010 | CN201467395U Automobile interior magnetic speaker T iron |
| 05/12/2010 | CN201467394U U-iron for loudspeaker |
| 04/29/2010 | WO2010025351A8 Methods and apparatus for reduced distortion balanced armature devices |
| 04/21/2010 | CN201440717U T-shape iron for loudspeaker |
| 04/21/2010 | CN1525434B Vibrator and method for manufacturing the same |
| 03/31/2010 | CN201435819Y T-iron component of electro-acoustic loudspeaker |
| 03/04/2010 | WO2010025351A2 Methods and apparatus for reduced distortion balanced armature devices |
| 02/24/2010 | CN100592821C Bone conductive speaker |
| 12/10/2009 | US20090304209 Bone conduction earphone |
| 09/16/2009 | EP2101515A1 Electromagnetic ultrasonic transducer and array thereof |
| 09/16/2009 | CN101536544A Sound converter with enclosure |
| 09/03/2009 | WO2009107578A1 Acoustic device |
| 04/08/2009 | CN100477814C Electromagnetic transducer and portable communication device |
| 03/31/2009 | US7512425 Portable telephone using bone conduction device |
| 12/17/2008 | CN201167413Y Pole piece of loudspeaker magnetizer |
| 11/18/2008 | US7454031 Multifunction speaker |
| 11/12/2008 | EP1481569B1 Flexible diaphragm with integrated coil |
| 08/27/2008 | CN101253804A Speaker, image element protective screen, case of terminal, and terminal |
| 07/23/2008 | EP1947901A1 Speaker, image element protective screen, case of terminal, and terminal |
| 06/26/2008 | WO2008074200A1 Electromagnetic ultrasonic transducer and array thereof |
| 06/26/2008 | CA2670508A1 Electromagnetic ultrasonic transducer and array thereof |
| 05/22/2008 | WO2008060026A1 Sound converter with enclosure |
| 05/20/2008 | US7376239 Electromechanical transducer and method for transforming energies |
| 05/14/2008 | CN101179875A Thin type high pitch loudspeaker |
| 04/03/2008 | WO2008037183A1 Electromagnetic vibrator and producing method thereof |
| 03/05/2008 | EP1895813A1 Acoustic tranducer |
| 01/23/2008 | EP1881732A1 Magnetic membrane suspension |
| 01/09/2008 | CN101102620A Electro-acoustic transducer and a method for assembly thereof |
| 12/13/2007 | US20070286448 Electroacoustic transducer diaphragm |
| 12/12/2007 | CN200990692Y Electromagnetic vibrator |
| 11/14/2007 | CN200976674Y Thin type high pitch loudspeaker |
| 11/07/2007 | CN200973174Y T iron end of loudspeaker |
| 11/06/2007 | US7292695 Bone conductive speaker |
| 10/24/2007 | CN200966153Y Super-narrow type loudspeaker magnetic circuit |
| 08/29/2007 | CN100334920C Driving circuit, electromechanic acoustic transducer and portable terminal device |
| 08/28/2007 | US7263034 Resonator device and circuits for 3-D detection/receiving sonic waves, even of a very low amplitude/frequency, suitable for use in cybernetics |
| 05/10/2007 | WO2007052835A1 Speaker, image element protective screen, case of terminal, and terminal |
| 04/10/2007 | US7201996 Sound generator for a portable device |
| 03/21/2007 | CN1933678A Electromagnetic vibrator and producing method thereof |
| 03/08/2007 | WO2007027069A1 Improved bobbin case for rearranging earphone cord |
| 03/06/2007 | US7187779 Electromagnetic transducer and portable communication device |
| 02/22/2007 | WO2007020925A1 Electro-acoustic transducer |
| 01/04/2007 | WO2007001035A1 Ultrasonic speaker system |
| 12/21/2006 | US20060286998 Portable telephone using bone conduction device |
| 12/12/2006 | US7149151 Ultrasound transducer for application in extreme climatic conditions |
| 09/27/2006 | EP1705874A1 Portable telephone using bone conduction device |
| 09/20/2006 | CN2819692Y Convex rib U-shaped iron of loundspeaker |
| 08/30/2006 | CN1272983C Electro-acoustic transducer |
| 08/02/2006 | CN1267885C Lead wire connecting method |
| 06/13/2006 | US7062062 Electromagnetic sound producing device |
| 05/31/2006 | EP1224838B1 Electromagnetic transducer and portable communication device |
| 04/19/2006 | CN1253056C Planar series mangnetic circuit and electricity-mechanism-sound transducers using the magnetic circuit |
| 03/29/2006 | CN1248188C Electromagnetic sound generating apparatus |
| 03/01/2006 | CN1244089C Electric sound transducer |
| 03/01/2006 | CN1244088C Electric sound transducer |
| 02/15/2006 | CN1242645C Voice generator |
| 02/08/2006 | CN1241212C Loudspeaker |