Resources Contact Us Home
Browse by Category: Main > Communications
Class Information
Number: 181/193
Name: Acoustics > Sound-modifying means > Intensifying horn > Particular shape of the horn > Spiral sound path
Description: Subject matter wherein the wall of the horn is arranged to provide a spiral sound path.

Patents under this class:

Patent Number Title Of Patent Date Issued
8261685 Horn guard device for motorcycle Sep. 11, 2012
8205712 Ported loudspeaker enclosure with tapered waveguide absorber Jun. 26, 2012
7650006 Method to generate a plane acoustic wave front, a plane wave channel, a loudspeaker construction and a linear loudspeaker array Jan. 19, 2010
7617794 One piece horn cover Nov. 17, 2009
7284638 Loudspeaker low profile quarter wavelength transmission line and enclosure and method Oct. 23, 2007
6973994 Apparatus for increasing the quality of sound from an acoustic source Dec. 13, 2005
6648098 Spiral acoustic waveguide electroacoustical transducing system Nov. 18, 2003
6356643 Electro-acoustic transducer Mar. 12, 2002
4689609 Electronic horn with spiral deflecting walls coupled to a truncated cone structure Aug. 25, 1987
4206831 Loudspeaker coupler Jun. 10, 1980

  Recently Added Patents
Process for producing .beta.-sialon fluorescent material
Lamination sheet
Identification of biomarkers in biological samples and methods of using same
Selective thermal treatment of medical instrument portions with thermal treatment system instrument holder
Managing job execution
Light transformation particle and photobioreactor
Electrical converter with variable capacitor
  Randomly Featured Patents
Film with oxygen absorbing regions
Step-on type tone scale play device
Use of photopolymerization for amplification and detection of a molecular recognition event
Variable pitch cyclindrical cam mechanism for controlling the motion of a weft insertion member
Wet brake system for vehicles
Image reading apparatus
Polymerizations using adjuvant catalysts
Method of producing fiber, and methods of producing electron-emitting device, electron source, and image display device each using the fiber
Method and apparatus for efficiently encoding chromatic images using non-orthogonal basis functions
Restrainer for dogs