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Class Information
Number: 181/166
Name: Acoustics > Diaphragm > With damping means
Description: Subject matter including means to suppress or limit diaphragm vibrations.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8567555 Dual bore canalphone system Oct. 29, 2013
8542861 Loudspeaker, video device, and portable information processing apparatus Sep. 24, 2013
8498442 Loudspeaker, video device, and portable information processing apparatus Jul. 30, 2013
8261873 Electromagnetic linear drive source for logging-while-drilling/wireline acoustic applications Sep. 11, 2012
8189851 Optically clear diaphragm for an acoustic transducer and method for making same May. 29, 2012
8135164 Speaker Mar. 13, 2012
8073185 Electronic device Dec. 6, 2011
7946378 Membrane for an electroacoustic transducer May. 24, 2011
7877856 Method of manufacturing a speaker Feb. 1, 2011
7845461 Acoustic diaphragm and speaker Dec. 7, 2010
7726441 Acoustic vibratory plate Jun. 1, 2010
7686129 Acoustic horn having internally raised geometric shapes Mar. 30, 2010
7447322 Speaker having a transparent panel Nov. 4, 2008
7325650 Speaker Feb. 5, 2008
7319772 Speaker device for improving mid/high-range frequencies Jan. 15, 2008
7316289 Electro-acoustic transducer and method of manufacturing transducer Jan. 8, 2008
7306073 Electroacoustic transducer comprising a membrane with a middle area comprising stiffening grooves Dec. 11, 2007
7155021 Loudspeaker having an acoustic panel and an electrical driver Dec. 26, 2006
6920957 Loudspeaker diaphragm Jul. 26, 2005
6863152 Low profile audio speaker Mar. 8, 2005
6830876 Acoustic resistor for hearing improvement and audiometric applications, and method of making same Dec. 14, 2004
6820719 Butterfly damper Nov. 23, 2004
6814181 Electrically conductive damper device for speaker Nov. 9, 2004
6796401 Speaker apparatus equipped with means for producing complicated waveform of low frequency with higher improved fidelity Sep. 28, 2004
6789643 Butterfly damper Sep. 14, 2004
6751330 Speaker system Jun. 15, 2004
6732832 Speaker damper May. 11, 2004
6634456 Vibrating diaphragm of false speaker structure Oct. 21, 2003
6626262 Waterproof speaker Sep. 30, 2003
6567528 Offset apex spider May. 20, 2003
6549637 Loudspeaker with differential flow vent means Apr. 15, 2003
6390232 Speaker cone assembly May. 21, 2002
6385327 Device having two coaxially disposed bodies which are movable relative to one another along a translation axis May. 7, 2002
6332029 Acoustic device Dec. 18, 2001
6321868 Watertight apparatus capable of being immersed and including an acoustic transducer Nov. 27, 2001
6305491 Speaker Oct. 23, 2001
6236733 Loudspeaker May. 22, 2001
6144753 Damper for a speaker apparatus Nov. 7, 2000
5909014 Low frequency equaphase surround loudspeaker Jun. 1, 1999
5878150 Damper for a loudspeaker and a method for producing the same Mar. 2, 1999
5761322 Portable computer speaker enclosure Jun. 2, 1998
5729616 Centering diaphragm Mar. 17, 1998
5714722 Loudspeaker Feb. 3, 1998
5689093 Cone of a speaker Nov. 18, 1997
5682021 Howling phenomena removing apparatus for video display appliances Oct. 28, 1997
5619019 Damper for loudspeaker Apr. 8, 1997
5432758 Electroacoustic transducer Jul. 11, 1995
5352506 Diaphragm Oct. 4, 1994
5304746 Reduction of standing waves and intermodulation distortion in electro-acoustic transducer Apr. 19, 1994
5256837 Paper cone for cone type speaker Oct. 26, 1993

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