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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
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