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Class Information
Number: 381/335
Name: Electrical audio signal processing systems and devices > Having non-electrical feature (e.g., mounting) > And loudspeaker > Plural diaphragms, compartments, or housings
Description: Subject matter in which there is a) more than one movable membrane within an enclosure, or b) an enclosure having more than one distinct volume, or c) more than one enclosure.










Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
7567680 Dual-diaphragm speaker assemblies with acoustic passageways and mobile terminals including the same Jul. 28, 2009
7515719 Method and apparatus to create a sound field Apr. 7, 2009
7496207 Cabinet for audio devices Feb. 24, 2009
7480389 Sound direction system Jan. 20, 2009
7471803 Integrated electro acoustic equipment with portable compact construction for sound applications Dec. 30, 2008
7454029 Loudspeaker array Nov. 18, 2008
7441630 Multi-driver speaker system Oct. 28, 2008
7415124 Low frequency surface array Aug. 19, 2008
7409071 Large-diameter arcuate speaker Aug. 5, 2008
7360626 Audio speaker with wobble free voice coil movement Apr. 22, 2008
7346315 Handheld device loudspeaker system Mar. 18, 2008
7343018 System of sound transducers with controllable directional properties Mar. 11, 2008
7329933 Silicon microphone with softly constrained diaphragm Feb. 12, 2008
7319766 In-wall loudspeaker Jan. 15, 2008
7319767 Line array electroacoustical transducing Jan. 15, 2008
7296653 Sound control apparatus Nov. 20, 2007
7298860 Rigging system for line array speakers Nov. 20, 2007
7261180 Rigging system for speaker cabinets Aug. 28, 2007
7260235 Line electroacoustical transducing Aug. 21, 2007
7225895 Audio speaker with wobble free voice coil movement Jun. 5, 2007
7218746 Retractable spa speaker system May. 15, 2007
7206427 Flat panel surface array Apr. 17, 2007
7201251 Modular speaker cabinet Apr. 10, 2007
7185735 Audio speaker with wobble free voice coil movement Mar. 6, 2007
7142827 Structural arrangement for a radio communication terminal incorporating a loudspeaker and an earpiece Nov. 28, 2006
7134523 System for integrating mid-range and high-frequency acoustic sources in multi-way loudspeakers Nov. 14, 2006
7133533 Passive acoustic radiating Nov. 7, 2006
7130432 Speaker mounting system and method Oct. 31, 2006
7113813 Mobile communication terminal and electro-acoustic transducer used for the same Sep. 26, 2006
7103193 Bandpass woofer enclosure with multiple acoustic fibers Sep. 5, 2006
7036781 Connecting unit for the angle-adjustable connection of at least two loudspeaker enclosures, and correspondingly connected loudspeaker enclosures May. 2, 2006
7021419 Speaker system Apr. 4, 2006
6968068 Foldable speakers Nov. 22, 2005
6961438 Loudspeaker system having wide-directional characteristics Nov. 1, 2005
6940990 Multi-channel audio center speaker device Sep. 6, 2005
6925190 Flush mount speaker mounting apparatus Aug. 2, 2005
6910549 Embedded multimedia speaker structure Jun. 28, 2005
6862360 Speaker system Mar. 1, 2005
6819767 Speaker unit and sound reproduction apparatus using the same Nov. 16, 2004
6810127 Clear sound side fill center fill Oct. 26, 2004
6798891 Speaker system Sep. 28, 2004
6782111 Multiple voicecoil and driver transducing Aug. 24, 2004
6778675 Speaker device Aug. 17, 2004
6758303 Electronic device having a multi-mode acoustic system and method for radiating sound waves Jul. 6, 2004
6739424 Speaker system May. 25, 2004
6719090 Speaker assembly Apr. 13, 2004
6721430 Musical bench Apr. 13, 2004
6704426 Loudspeaker system Mar. 9, 2004
6650758 Adaptive dual port loudspeaker implementation for reducing lateral transmission Nov. 18, 2003
6643379 Acoustical transducer for recreating a spatial sound stage and improved localization of original sounds sources Nov. 4, 2003

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