Resources Contact Us Home
Browse by Category: Main > Communications
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

  Recently Added Patents
Duty cycle adjustment of remote illumination source to maintain illumination output
LED package chip classification system
System and method for predicting remaining useful life of device components
Key management system
Polymer compositions and nonwoven compositions prepared therefrom
Mobile terminal device capable of more effectively utilizing operation portions, conductive portion, operation detecting unit, power supply unit, and signal processing unit
Factor IXa crystals, related complexes and methods
  Randomly Featured Patents
Digital-to-analog conversion circuit
Scavenging mask
Furniture glide having interchangeable base
Methods and compositions for enhancing the efficacy and specificity of RNA silencing
Envelope and image-forming apparatus using the same
Device for fixing a burner ring in an afterburner combustion chamber of a turbojet engine
Spiral-wound lead-acid batteries having capacity adapters
Telephone set
Apparatus for actuating a pressure delivery system of a fluid sampler
Process, apparatus, and system for storing data check information using standard sector data field sizes