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Class Information
Number: 181/188
Name: Acoustics > Sound-modifying means > Intensifying horn > Plural intensifying portions > Similar portions
Description: Subject matter wherein the plural intensifying portions have substantially the same shape or are mirror images of one another.










Patents under this class:

Patent Number Title Of Patent Date Issued
8649544 Phasing plug for a compression driver Feb. 11, 2014
8191674 Acoustic loading device for loudspeakers Jun. 5, 2012
7299893 Loudspeaker horn and method for controlling grating lobes in a line array of acoustic sources Nov. 27, 2007
6905001 Sounders for fire alarm systems Jun. 14, 2005
6393131 Loudspeaker May. 21, 2002
5804774 Ported reflex horn Sep. 8, 1998
5675133 Horn and sounder Oct. 7, 1997
5397866 Dual acoustic horn assembly Mar. 14, 1995
5220608 Method and means for stereophonic sound reproduction Jun. 15, 1993
5160815 Megaphone apparatus Nov. 3, 1992
5004067 Cinema sound system for unperforated screens Apr. 2, 1991
4997058 Sound transducer Mar. 5, 1991
4969196 Speaker and horn array Nov. 6, 1990
4908601 Loud speaker with horizontal radiation pattern Mar. 13, 1990
4893343 Dual diverging manifold loudspeaker system Jan. 9, 1990
4878561 Sound emitter Nov. 7, 1989
4847590 Outdoor warning siren Jul. 11, 1989
4776428 Sound projection system Oct. 11, 1988
4390078 Loudspeaker horn Jun. 28, 1983
4299304 Exponential folded horn speaker enclosure Nov. 10, 1981
4174019 Dual speaker Nov. 13, 1979
4091891 Horn speaker May. 30, 1978











 
 
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