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Class Information
Number: 181/168
Name: Acoustics > Diaphragm > Critically defined material or coating > Metallic material
Description: Subject matter wherein the material of which the diaphragm is made is metal.










Patents under this class:

Patent Number Title Of Patent Date Issued
8340341 Coated speaker dome Dec. 25, 2012
8262824 Method for manufacturing electret diaphragm Sep. 11, 2012
8235168 Diaphragm for speaker, frame for speaker, dust cap for speaker, speaker and apparatus using them, and method for manufacturing component for speaker Aug. 7, 2012
8230966 Diaphragm for speaker, frame for speaker, dust cap for speaker, speaker and apparatus using them, and method for manufacturing component for speaker Jul. 31, 2012
8177021 Diaphragm for speaker, frame for speaker, dust cap for speaker, speaker and apparatus using them, and method for manufacturing component for speaker May. 15, 2012
8122996 Diaphragm for speaker, frame for speaker, dust cap for speaker, speaker and apparatus using them, and method for manufacturing component for speaker Feb. 28, 2012
7878297 Acoustic transducer made of pure beryllium with directed radiation, with a concave-shaped diaphragm, for audio applications, in particular for acoustic enclosures Feb. 1, 2011
7467686 Speaker diaphragms, manufacturing methods of the same, and dynamic speakers Dec. 23, 2008
7280668 Ceramic metal matrix diaphragm for loudspeakers Oct. 9, 2007
6929092 Speaker diaphragm Aug. 16, 2005
6920230 Electromagnetic transducer and portable communication device Jul. 19, 2005
6814181 Electrically conductive damper device for speaker Nov. 9, 2004
6804371 Speaker having a laser vibration diaphragm Oct. 12, 2004
6658326 Noise reduction system and method Dec. 2, 2003
6634456 Vibrating diaphragm of false speaker structure Oct. 21, 2003
6394224 Structure of speaker May. 28, 2002
6364966 Method for manufacturing acoustic vibration plate Apr. 2, 2002
6327372 Ceramic metal matrix diaphragm for loudspeakers Dec. 4, 2001
6275598 Sound reproduction device Aug. 14, 2001
5796054 Loudspeaker diaphragm Aug. 18, 1998
5406038 Shielded speaker Apr. 11, 1995
5251188 Elongated-pattern sonic transducer Oct. 5, 1993
5135582 Method for forming a diaphragm and diaphragm Aug. 4, 1992
5080743 Process for preparation of a wholly carbonaceous diaphragm for acoustic equipment use Jan. 14, 1992
4726443 Diaphragm Feb. 23, 1988
4713277 Foamed metal and method of producing same Dec. 15, 1987
4709392 Dome speaker with a diaphragm having at least one elongated cut-out portion Nov. 24, 1987
4655316 Acoustic diaphragm Apr. 7, 1987
4518443 Acoustic diaphragm May. 21, 1985
4512435 Diaphragm for loudspeakers Apr. 23, 1985
4484383 Method of manufacturing a speaker diaphragm Nov. 27, 1984
4470479 Method of making metal coated foil speaker diaphragm Sep. 11, 1984
4461930 Acoustic transducer with honeycomb diaphragm Jul. 24, 1984
4351411 Speaker device Sep. 28, 1982
4344503 Diaphragm for electro-acoustic transducer Aug. 17, 1982
4315557 Diaphragm for electro-acoustic transducer Feb. 16, 1982
4254184 Vibrating member for acoustic transducer and method for manufacturing the same Mar. 3, 1981
4216271 Composite diaphragm for speaker Aug. 5, 1980
4135601 Boron coated diaphragm for use in a loud speaker Jan. 23, 1979











 
 
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