Class 181/183 - Double wall

Subclass of Class 181 - Acoustics
Definition: Subject matter wherein the resonant chamber lies between
No. of patents: 4
Last issue date: 02/20/2007

Number	Title	Issue Date
7178629	Electroacoustic public address unit with acoustic horn or waveguide A horn or waveguide public address unit, enabling to adapt the dispersion characteristics of the horn or waveguide. The unit is provided with at least one profiling component (21a, 21b) constituting a removable dispersion shaper, capable ...	02/20/2007
6986260	Electrical fan system for vehicle An electric fan system has a first electric blower 10, which utilizes a brushless motor, and a second electric blower, which utilizes a brushed motor, for distributing the cooling air to the radiator and the condenser. The system has an electronic engine cont...	01/17/2006
6836239	Method and system for displaying text on a radial display A method for displaying horizontally aligned characters on a radial display is disclosed. Each range bin for each scan line is associated with a rectangular grid location to determine the character located in the grid location and the background color and foreground...	12/28/2004
6001132	Preparation of aqueous solutions suitable for finishing cellulose containing textile materials Aqueous solutions of N-methylol compounds of carboxamides, urethanes, ureas and aminotriazines or of N-methylol ethers of these compounds that are suitable for finishing cellulose-containing textile materials are prepared by reaction of compounds having o...	12/14/1999

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