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Class Information
Number: 181/173
Name: Acoustics > Diaphragm > Particular shape
Description: Subject matter characterized by the form or configuration of the diaphragm.










Sub-classes under this class:

Class Number Class Name Patents
181/174 Variable thickness 36


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8672088 Phase plug and acoustic lens for direct radiating loudspeaker Mar. 18, 2014
8630440 Loudspeakers Jan. 14, 2014
8532327 Diaphragm and speaker device provided with the same Sep. 10, 2013
8479872 Ring shaped membrane for an electro-acoustical loudspeaker Jul. 9, 2013
8418802 Phase plug and acoustic lens for direct radiating loudspeaker Apr. 16, 2013
8259987 Diaphragm, diaphragm assembly and electroacoustic transducer Sep. 4, 2012
8256567 Diaphragm and speaker using same Sep. 4, 2012
8240426 Three dimensional acoustic passive radiating Aug. 14, 2012
8224016 Electroacoustic transducer having multi-channel diaphragm and hearing aid using the same Jul. 17, 2012
8215445 Electroacoustic transducer Jul. 10, 2012
8199962 Loudspeaker diaphragm and loudspeaker using the same Jun. 12, 2012
8181736 Phase plug and acoustic lens for direct radiating loudspeaker May. 22, 2012
8141676 Compound membrane and acoustic device using same Mar. 27, 2012
8141677 Ring shaped membrane for an electro-acoustical loudspeaker Mar. 27, 2012
8139784 Compound loudspeaker Mar. 20, 2012
8126179 Diaphragm and sound output apparatus Feb. 28, 2012
7946378 Membrane for an electroacoustic transducer May. 24, 2011
7877856 Method of manufacturing a speaker Feb. 1, 2011
7866439 Membrane for an electroacoustic transducer Jan. 11, 2011
7822222 Loudspeaker and method of manufacturing the same Oct. 26, 2010
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
7546897 Speaker diaphragm and method of manufacturing speaker diaphragm Jun. 16, 2009
7510047 Speaker edge and resonator panel assembly Mar. 31, 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
7416047 Diaphragm for a loudspeaker with a moving coil Aug. 26, 2008
7332215 Resin-molded component and method for manufacturing thereof as well as diaphragm for loudspeaker Feb. 19, 2008
7306073 Electroacoustic transducer comprising a membrane with a middle area comprising stiffening grooves Dec. 11, 2007
7275620 Square speaker Oct. 2, 2007
7174990 Tangential stress reduction system in a loudspeaker suspension Feb. 13, 2007
6957714 Speaker and speaker diaphragm Oct. 25, 2005
6931140 Electro-acoustic transducer with two diaphragms Aug. 16, 2005
6929091 Planar diaphragm loudspeaker and related methods Aug. 16, 2005
6920957 Loudspeaker diaphragm Jul. 26, 2005
6889796 Loudspeaker suspension May. 10, 2005
6888946 High frequency loudspeaker May. 3, 2005
6863153 Loudspeaker diaphragm Mar. 8, 2005
6862361 Audio speaker Mar. 1, 2005
6851513 Tangential stress reduction system in a loudspeaker suspension Feb. 8, 2005
6839445 Piezoelectric speaker Jan. 4, 2005
6785397 Electro-acoustic converter Aug. 31, 2004
6779627 Flat panel sound radiator with fire protective back box Aug. 24, 2004
6672423 Speaker and method of assembling the speaker Jan. 6, 2004
6655495 Loudspeaker damper and loudspeaker Dec. 2, 2003
6644182 Method of producing cone diaphragm having color patterns Nov. 11, 2003
6626263 Passive speaker system Sep. 30, 2003
6622817 Sound reproduction device working according to the bending wave principle Sep. 23, 2003
6612399 Lightweight low frequency loudspeaker for active noise control Sep. 2, 2003
6590993 Panel-shaped loudspeaker Jul. 8, 2003

1 2 3










 
 
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