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Class Information
Number: 181/143
Name: Acoustics > Moving sound producer or deflector
Description: Subject matter for continuously moving a sound source (e.g., loudspeaker) or for continuously moving a sound reflector located in the sound path.

Patents under this class:

Patent Number Title Of Patent Date Issued
8498433 Sonic motion apparatus Jul. 30, 2013
6520280 System and method for workspace sound regulation Feb. 18, 2003
5146434 Sound focusing device Sep. 8, 1992
4847590 Outdoor warning siren Jul. 11, 1989
4718372 Vehicle warning system Jan. 12, 1988
4689609 Electronic horn with spiral deflecting walls coupled to a truncated cone structure Aug. 25, 1987
4635039 Low drag warning system for emergency vehicles Jan. 6, 1987
4554531 Omnidirectional siren Nov. 19, 1985
4432299 Impulse noise generator Feb. 21, 1984
4334211 Speaker grille for streamlined light bar mounted on vehicle roof Jun. 8, 1982
4253368 Universal pulsato unit Mar. 3, 1981
4035582 Tremolo effect producing system Jul. 12, 1977
3961684 Omni-directional sound system Jun. 8, 1976

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