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Class Information
Number: 181/186
Name: Acoustics > Sound-modifying means > Intensifying horn > With sound-path restriction > Adjustable
Description: Subject matter wherein the structure can be altered or moved within the horn.

Patents under this class:

Patent Number Title Of Patent Date Issued
8213669 Rotary tweeter mounting arrangement for a speaker assembly Jul. 3, 2012
8191674 Acoustic loading device for loudspeakers Jun. 5, 2012
7178629 Electroacoustic public address unit with acoustic horn or waveguide Feb. 20, 2007
6766027 Elliptical flushmount speaker Jul. 20, 2004
6335974 Speaker system for television receiver with sound ducts and perforated panels Jan. 1, 2002
5837890 Jet engine test cell structure Nov. 17, 1998
5351220 Moving-coil electrodynamic electroacoustical transducer Sep. 27, 1994
5146434 Sound focusing device Sep. 8, 1992
4997058 Sound transducer Mar. 5, 1991
4419545 Electret transducer Dec. 6, 1983
4194590 Loudspeaker horn with adjustable angle of dispersion Mar. 25, 1980

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