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Class Information
Number: 181/144
Name: Acoustics > Plural diaphragm sound sources
Description: Subject matter including at least two separate means that can be vibrated by sound waves or produce sound waves.










Sub-classes under this class:

Class Number Class Name Patents
181/145 Plural chambers 163
181/147 Three diaphragms 92
181/146 With sound-asborbing means 77


Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8520885 Composite speaker Aug. 27, 2013
8511422 Flexible multiple speaker support apparatus Aug. 20, 2013
8469140 Radial waveguide for double cone transducers Jun. 25, 2013
8397860 Speaker enclosure Mar. 19, 2013
8284977 Multi chamber ported stereo speaker Oct. 9, 2012
8256566 Speaker enclosure Sep. 4, 2012
8229155 Speaker assembly with directional adjustability Jul. 24, 2012
8201659 Recoilless speaker system Jun. 19, 2012
8194904 Speaker system with broad directivity Jun. 5, 2012
8167083 Reconfigurable loudspeaker enclosure May. 1, 2012
8130996 Loud speaker group assembled from a plurality of loud speakers with snap-on connections Mar. 6, 2012
8050442 Cascaded transducer array arrangement for control over an acoustic pressure gradient through a horn Nov. 1, 2011
8050432 Sound system Nov. 1, 2011
8050441 Portable speakers Nov. 1, 2011
7992673 On-wall loudspeaker and mounting apparatus Aug. 9, 2011
7986805 Acoustic diaphragm Jul. 26, 2011
7912240 Dual diaphragm electroacoustic transducer Mar. 22, 2011
7886867 Flexible multiple speaker support apparatus Feb. 15, 2011
7837006 Enhanced spectrum acoustic energy projection system Nov. 23, 2010
7835536 Electro-acoustic transducer with multi-faced diaphragm assembly Nov. 16, 2010
7789192 Loudspeaker port handle Sep. 7, 2010
7748495 Tubular loudspeaker Jul. 6, 2010
7650006 Method to generate a plane acoustic wave front, a plane wave channel, a loudspeaker construction and a linear loudspeaker array Jan. 19, 2010
7577265 Loudspeaker system providing improved sound presence and frequency response in mid and high frequency ranges Aug. 18, 2009
7575095 Speaker Aug. 18, 2009
7553288 Sound and vibration transmission pad and system Jun. 30, 2009
7418104 Speaker system Aug. 26, 2008
7392880 Dual range horn with acoustic crossover Jul. 1, 2008
7350618 Multimedia speaker product Apr. 1, 2008
7343018 System of sound transducers with controllable directional properties Mar. 11, 2008
7333626 Arbitrary coverage angle sound integrator Feb. 19, 2008
7328769 Rigging system for loudspeaker arrays Feb. 12, 2008
7301094 Device for driving vibration source Nov. 27, 2007
7261180 Rigging system for speaker cabinets Aug. 28, 2007
7204799 Microphone optimized for implant use Apr. 17, 2007
7188703 Device for establishing noise in a motor vehicle Mar. 13, 2007
7151836 Speaker apparatus and sound reproduction apparatus Dec. 19, 2006
7134523 System for integrating mid-range and high-frequency acoustic sources in multi-way loudspeakers Nov. 14, 2006
7130432 Speaker mounting system and method Oct. 31, 2006
7092541 Surround sound loudspeaker system Aug. 15, 2006
7021419 Speaker system Apr. 4, 2006
7011178 Sound transmitter and speaker Mar. 14, 2006
6961438 Loudspeaker system having wide-directional characteristics Nov. 1, 2005
6870942 Loudspeaker for line array sound system Mar. 22, 2005
6834113 Loudspeaker system Dec. 21, 2004
6816065 Electromechanical horn warning system Nov. 9, 2004
6766027 Elliptical flushmount speaker Jul. 20, 2004
6721431 Prismatic loudspeaker/microphone array Apr. 13, 2004
6704426 Loudspeaker system Mar. 9, 2004
6678384 Speaker structure Jan. 13, 2004

1 2 3 4 5 6










 
 
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