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Class Information
Number: 181/197
Name: Acoustics > Sound-modifying means > Within tubular means > Adjustable
Description: Subject matter wherein the sound modifying structure can be altered or moved within the tubular member.

Patents under this class:

Patent Number Title Of Patent Date Issued
8511422 Flexible multiple speaker support apparatus Aug. 20, 2013
8453788 Implementing dynamic noise elimination with acoustic frame design Jun. 4, 2013
8340337 Loudspeaker module Dec. 25, 2012
7886867 Flexible multiple speaker support apparatus Feb. 15, 2011
7533760 Noise reduction tubes May. 19, 2009
7497300 Noise reduction tubes Mar. 3, 2009
7350618 Multimedia speaker product Apr. 1, 2008
6810127 Clear sound side fill center fill Oct. 26, 2004
6724904 Microphone mounting assembly Apr. 20, 2004
5721401 Sub-woofer module Feb. 24, 1998
5450495 Loudspeaker system Sep. 12, 1995
5309808 Acoustic practice mute May. 10, 1994

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