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Class Information
Number: 381/332
Name: Electrical audio signal processing systems and devices > Having non-electrical feature (e.g., mounting) > And loudspeaker
Description: Subject matter where the specific container holds a transducer for converting an electrical signal into sound, e.g., a transducer baffle or housing.


Sub-classes under this class:

Class Number Class Name Patents
381/336 Curved or angled housing 82
381/335 Plural diaphragms, compartments, or housings 125
381/334 Portable or for use in diverse environment 65
381/333 With furniture, clothing, or image presentation means 145


Patents under this class:
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Patent Number Title Of Patent Date Issued
7377358 Frame for speaker device and speaker device May. 27, 2008
7263196 Mobile communications terminal with flat loudspeaker disposed in the terminal housing Aug. 28, 2007
7130432 Speaker mounting system and method Oct. 31, 2006
7100879 Speaker bracket Sep. 5, 2006
7043042 Button apparatus with a speaker May. 9, 2006
7043034 Loudspeaker with single or dual channel input selector and lockout May. 9, 2006
7031476 Method and apparatus for intelligent speaker Apr. 18, 2006
6711546 Unary coding scheme for digital audio signals Mar. 23, 2004
6704429 Earphone without impulse noise and surroundings blockade Mar. 9, 2004
6546298 Speaker apparatus and a computer system incorporating same Apr. 8, 2003
6463160 Low profile loudspeaker assembly Oct. 8, 2002
6373955 Loudspeakers Apr. 16, 2002
6339649 Loudspeaker system with stackable loudspeaker units Jan. 15, 2002
6335975 Rainproof and omnidirectional loudspeaker system Jan. 1, 2002
6192137 Garment capable of outputting a sound Feb. 20, 2001
6175489 Onboard speaker system for portable computers which maximizes broad spatial impression Jan. 16, 2001
6154553 Sound bubble structures for sound reproducing arrays Nov. 28, 2000
6111968 Sound production apparatus Aug. 29, 2000
6035962 Easily-combinable and movable speaker case Mar. 14, 2000
5898787 Fetal and infant audio bag apparatus Apr. 27, 1999
5898137 Speaker system for television set Apr. 27, 1999
5887071 Dipole speaker headrests Mar. 23, 1999
5841877 Vehicle armrest transducing Nov. 24, 1998
5828766 Acoustic speaker system Oct. 27, 1998
5812685 Non-directional speaker system with point sound source Sep. 22, 1998
5812675 Sound reproducing array processor system Sep. 22, 1998
5807617 Hollow structural component Sep. 15, 1998
5809150 Surround sound loudspeaker system Sep. 15, 1998
5809153 Electroacoustical transducing Sep. 15, 1998
5802194 Stereo loudspeaker system with tweeters mounted on rotatable enlongated arms Sep. 1, 1998
5793876 Method for the diffusion of a sound with a given density Aug. 11, 1998
5789693 Loudspeaker system for electronic piano Aug. 4, 1998
5784473 Sound system Jul. 21, 1998
5771154 Heatsink assembly for a high-power device Jun. 23, 1998
5764776 System for imparting sensory effects across a mother's abdomen to a fetus Jun. 9, 1998
5761322 Portable computer speaker enclosure Jun. 2, 1998
5751821 Speaker system with reconfigurable, high-frequency dispersion pattern May. 12, 1998
5745584 Sound bubble structures for sound reproducing arrays Apr. 28, 1998
5742690 Personal multimedia speaker system Apr. 21, 1998
5740259 Pressure wave transducing Apr. 14, 1998
5737787 Pillow radio apparatus Apr. 14, 1998
5732140 Acoustic speaker system with expandable speaker enclosure Mar. 24, 1998
5710821 Audio communications system with built in expansion capability for a desktop computer Jan. 20, 1998
5699558 Garment for audio stimulation of fetus Dec. 23, 1997
5689570 Sound reproducing array processor system Nov. 18, 1997
5689574 Integral sound module for a modular monitor Nov. 18, 1997
5677961 Connecting element for speaker elements Oct. 14, 1997
5673329 Omni-directional loudspeaker system Sep. 30, 1997
5668882 Notebook computer speakers Sep. 16, 1997
5664020 Compact full-range loudspeaker system Sep. 2, 1997

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