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Class Information
Number: 181/183
Name: Acoustics > Sound-modifying means > Intensifying horn > With resonant chamber > Double wall
Description: Subject matter wherein the resonant chamber lies between at least part of a side of the horn and a second structure substantially parallel to that part of the horn.

Patents under this class:

Patent Number Title Of Patent Date Issued
7813770 Speaker module design Oct. 12, 2010
6986260 Electrical fan system for vehicle Jan. 17, 2006
6836239 Method and system for displaying text on a radial display Dec. 28, 2004
6001132 Preparation of aqueous solutions suitable for finishing cellulose containing textile materials Dec. 14, 1999

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