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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 5243150 |
Ribbon transducers |
Sep. 7, 1993 |
| 5198624 |
Audio transducer with controlled flexibility diaphragm |
Mar. 30, 1993 |
| 5181252 |
High compliance headphone driving |
Jan. 19, 1993 |
| 5162619 |
Diaphragm for a loudspeaker |
Nov. 10, 1992 |
| 5148492 |
Diaphragm of dynamic microphone |
Sep. 15, 1992 |
| 5115474 |
Speaker system |
May. 19, 1992 |
| 4997058 |
Sound transducer |
Mar. 5, 1991 |
| 4903308 |
Audio transducer with controlled flexibility diaphragm |
Feb. 20, 1990 |
| 4847908 |
Loudspeaker having a two-part diaphragm for use as a car loudspeaker |
Jul. 11, 1989 |
| 4815560 |
Microphone with frequency pre-emphasis |
Mar. 28, 1989 |
| 4805221 |
Construction of sound converter in sound guide, especially for loudspeakers, for example speaker boxes |
Feb. 14, 1989 |
| 4799264 |
Speaker system |
Jan. 17, 1989 |
| 4619342 |
Multiple sound transducer system utilizing an acoustic filter to reduce distortion |
Oct. 28, 1986 |
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