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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
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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