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Class Information
Number: 181/164
Name: Acoustics > Diaphragm > Sectional diaphragm
Description: Subject matter wherein the diaphragm has areas of different material, shape or thickness which are united to form a vibratable partition.










Sub-classes under this class:

Class Number Class Name Patents
181/165 Concentric annular section 29


Patents under this class:

Patent Number Title Of Patent Date Issued
8280097 Microelectromechanical system diaphragm and fabricating method thereof Oct. 2, 2012
8224016 Electroacoustic transducer having multi-channel diaphragm and hearing aid using the same Jul. 17, 2012
8218795 Methods for forming and using thin film ribbon microphone elements and the like Jul. 10, 2012
7946378 Membrane for an electroacoustic transducer May. 24, 2011
7775319 Diaphragm for speaker and manufacturing method therefor Aug. 17, 2010
7743879 Diaphragm, spherical-shell diaphragm and electroacoustic transducer, and method of manufacturing electroacoustic transducer Jun. 29, 2010
7558399 Vibrating plate of dynamic microphone and method of manufacturing the same Jul. 7, 2009
7438156 Diaphragm, spherical-shell diaphragm and electroacoustic transducer, and method of manufacturing electroacoustic transducer Oct. 21, 2008
7428946 Suspension and electro-acoustic transducer using the suspension Sep. 30, 2008
7329933 Silicon microphone with softly constrained diaphragm Feb. 12, 2008
7306073 Electroacoustic transducer comprising a membrane with a middle area comprising stiffening grooves Dec. 11, 2007
6920230 Electromagnetic transducer and portable communication device Jul. 19, 2005
6857501 Method of forming parylene-diaphragm piezoelectric acoustic transducers Feb. 22, 2005
6745867 Loudspeaker drive unit Jun. 8, 2004
6672423 Speaker and method of assembling the speaker Jan. 6, 2004
6634456 Vibrating diaphragm of false speaker structure Oct. 21, 2003
6578661 Speaker apparatus Jun. 17, 2003
6513623 Speaker Feb. 4, 2003
6454046 Synchronous dustproof cover structure for sound membrane Sep. 24, 2002
6237716 Standard-sized vibrating diaphragm speaker structure May. 29, 2001
6236733 Loudspeaker May. 22, 2001
6178252 Electroacoustic transducer comprising a diaphragm having through portions for mounting a voice coil Jan. 23, 2001
6134337 Loudspeaker Oct. 17, 2000
6026929 High frequency radially arcuated center speaker cone with variable thickness Feb. 22, 2000
5847332 Polycarbonate-based radially arcuated speaker cone Dec. 8, 1998
5256837 Paper cone for cone type speaker Oct. 26, 1993
5195143 Acoustical ribbon transducer loudspeaker system Mar. 16, 1993
5103927 Variable pattern, collapsible, directional transducer Apr. 14, 1992
5025474 Speaker system with image projection screen Jun. 18, 1991
4997058 Sound transducer Mar. 5, 1991
4903308 Audio transducer with controlled flexibility diaphragm Feb. 20, 1990
4899390 Thin speaker having an enclosure within an open portion and a closed portion Feb. 6, 1990
4881617 Radially arcuated speaker cone Nov. 21, 1989
4709392 Dome speaker with a diaphragm having at least one elongated cut-out portion Nov. 24, 1987
4655316 Acoustic diaphragm Apr. 7, 1987
4512435 Diaphragm for loudspeakers Apr. 23, 1985
4056697 Movable diaphragm connector method flexible hinge diaphragm surround and electro-acoustic transducer with folded diaphragm with intermediate flexible portions Nov. 1, 1977











 
 
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