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Class Information
Number: 181/192
Name: Acoustics > Sound-modifying means > Intensifying horn > Particular shape of the horn
Description: Subject matter characterized by the form or configuration of a wall of the horn.










Sub-classes under this class:

Class Number Class Name Patents
181/194 Doubly folded sound path 21
181/193 Spiral sound path 10
181/195 Wide angle annular outlet 18


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8627920 Folded horn enclosure with inter-channel reflex-porting Jan. 14, 2014
8548184 Constant coverage waveguide Oct. 1, 2013
8522917 Cell phone sound amplifying extend cup Sep. 3, 2013
8469140 Radial waveguide for double cone transducers Jun. 25, 2013
8213658 Acoustical horn Jul. 3, 2012
8036403 Directional sound wave radiator Oct. 11, 2011
7979147 Engine sound replication device Jul. 12, 2011
7936892 Constant coverage waveguide May. 3, 2011
7886869 Acoustic waveguide mode controlling Feb. 15, 2011
7845462 Wide frequency range horn with modular method for reducing diffraction effects Dec. 7, 2010
7743878 Folded horn enclosure with unitary pathway Jun. 29, 2010
7735599 Sound wave guide structure for speaker system and horn speaker Jun. 15, 2010
7686129 Acoustic horn having internally raised geometric shapes Mar. 30, 2010
7631724 Sound-wave path-length correcting structure for speaker system Dec. 15, 2009
7520368 Horizontally folded reflex-ported bass horn enclosure Apr. 21, 2009
7513332 Convertible folded horn enclosure with improved compactness Apr. 7, 2009
7392880 Dual range horn with acoustic crossover Jul. 1, 2008
7360499 Helmholtz resonator type marine signal Apr. 22, 2008
7275621 Skew horn for a loudspeaker Oct. 2, 2007
7268467 Acoustic transducer Sep. 11, 2007
7095868 Phase plug with optimum aperture shapes Aug. 22, 2006
7044265 Constant directivity acoustic horn May. 16, 2006
6868937 Sub-woofer system for use in vehicle Mar. 22, 2005
6837334 Acoustic horn Jan. 4, 2005
6754360 Signal-horn Jun. 22, 2004
6712177 Cross-fired multiple horn loudspeaker system Mar. 30, 2004
6585077 Sound-producing device with acoustic waveguide Jul. 1, 2003
6557664 Loudspeaker May. 6, 2003
6334505 Optimum edges for speakers and musical instruments Jan. 1, 2002
6112847 Loudspeaker with differentiated energy distribution in vertical and horizontal planes Sep. 5, 2000
6079514 Acoustic horn transducer with a conic type diffuser having and exponential profile in wood Jun. 27, 2000
6059069 Loudspeaker waveguide design May. 9, 2000
5991421 Radially expanding multiple flat-surfaced waveguide device Nov. 23, 1999
5925856 Loudspeaker horn Jul. 20, 1999
5828627 Method of and apparatus for producing spherical waves in the ultrasonic range Oct. 27, 1998
5750943 Speaker array with improved phase characteristics May. 12, 1998
5646381 Roof mounted sound horns for vehicles Jul. 8, 1997
5631450 Megaphone May. 20, 1997
5398992 Seat having sound system with acoustic waveguide Mar. 21, 1995
5285025 Loudspeaker horn Feb. 8, 1994
5206465 Sound collecting and concentrating device for attaching to the back of a loudspeaker Apr. 27, 1993
5187333 Coiled exponential bass/midrange/high frequency horn loudspeaker Feb. 16, 1993
5163167 Sound wave guide Nov. 10, 1992
5160815 Megaphone apparatus Nov. 3, 1992
5020630 Loudspeaker and horn therefor Jun. 4, 1991
4975623 Electromagnetic relay for transmitting operating sounds thereof Dec. 4, 1990
4930596 Loudspeaker system Jun. 5, 1990
4908601 Loud speaker with horizontal radiation pattern Mar. 13, 1990
4884251 Housing for a sonic transducer Nov. 28, 1989
4878561 Sound emitter Nov. 7, 1989

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