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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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Class Information
Number: 381/341
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Having acoustic wave modifying structure > Sound intensifying or spreading element > Horn > Inverted, folded, or curled
Description: Subject matter in which a) a crossectional area of the sound conducting element decreases as a distance from a diaphragm increases, or b) the sound path of the element has one or more sharp bends, or c) an entrance of the element is smoothly curved back toward an exit.


Patents under this class:

Patent Number Title Of Patent Date Issued
7602934 Speaker system with built-in storage of satellite speakers Oct. 13, 2009
7520368 Horizontally folded reflex-ported bass horn enclosure Apr. 21, 2009
7513332 Convertible folded horn enclosure with improved compactness Apr. 7, 2009
7506721 Convertible folded horn enclosure Mar. 24, 2009
7454030 Subwoofer with cascaded linear array of drivers Nov. 18, 2008
7450733 Speaker with externally mounted acoustic extension Nov. 11, 2008
7252175 Speaker apparatus and manufacturing method of speaker apparatus Aug. 7, 2007
7252176 Reflex-ported folded horn enclosure Aug. 7, 2007
7233677 Top-loading folded corner horn Jun. 19, 2007
7190801 Horn loudspeaker Mar. 13, 2007
7142680 Multiple waveguide coaxial ceiling loudspeaker Nov. 28, 2006
7039212 Weather resistant porting May. 2, 2006
6973994 Apparatus for increasing the quality of sound from an acoustic source Dec. 13, 2005
6754360 Signal-horn Jun. 22, 2004
6658127 Speaker system having an amplifying horn Dec. 2, 2003
6634455 Thin-wall multi-concentric sleeve speaker Oct. 21, 2003
6393131 Loudspeaker May. 21, 2002
6389144 Sound field equalizing apparatus for speaker system May. 14, 2002
6144309 Alarm device with multiple indicators and flameproof housing Nov. 7, 2000
6127918 Buzzer with a sound film and equalizing or whirlpool sound mechanism Oct. 3, 2000
6078676 Speaker system with a three-dimensional spiral sound passage Jun. 20, 2000
6035051 Sound apparatus Mar. 7, 2000
5970158 Compact horn speaker Oct. 19, 1999
5898788 Loudspeaker system Apr. 27, 1999
5896460 Speaker Apr. 20, 1999
5822443 Speaker system for a television Oct. 13, 1998
5815589 Push-pull transmission line loudspeaker Sep. 29, 1998
5367576 Horn speaker Nov. 22, 1994
5012889 Speaker enclosure May. 7, 1991
4982436 Dual horn folded soundpath loudspeaker Jan. 1, 1991
4979219 Piezoelectric speakers Dec. 18, 1990
4969196 Speaker and horn array Nov. 6, 1990
4963855 Warning sound generating device Oct. 16, 1990
4893343 Dual diverging manifold loudspeaker system Jan. 9, 1990
4860367 Low frequency loud speaker Aug. 22, 1989
4853964 Electroacoustic apparatus for reproducing lowest to medium frequencies Aug. 1, 1989
4850452 Loudspeaker structure Jul. 25, 1989
4836327 Sound reinforcement enclosure employing cone loudspeaker with annular central loading member and coaxially mounted compression driver Jun. 6, 1989
4790408 Coiled exponential bass/midrange horn loudspeakers Dec. 13, 1988
4518826 Vandal-proof communication system May. 21, 1985
4485275 Inverted horn loudspeaker Nov. 27, 1984
4385211 Reflex horn speaker with a waterproofing device May. 24, 1983
4317009 Coldproof reflex horn speaker Feb. 23, 1982
4313032 Folded horn loudspeaker system Jan. 26, 1982
4138594 Small dimension low frequency folded exponential horn loudspeaker with unitary sound path and loudspeaker system including same Feb. 6, 1979



 
 
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