Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Communications
Class Information
Number: 181/180
Name: Acoustics > Sound-modifying means > Intensifying horn > Material
Description: Subject matter wherein the horn is constructed of a specific material or materials.










Patents under this class:

Patent Number Title Of Patent Date Issued
8028790 Sound projection device attachable to a user when not in use Oct. 4, 2011
7984842 Megaphone popcorn cup Jul. 26, 2011
7588121 Flexible polyurethane foam and process for its production Sep. 15, 2009
6724904 Microphone mounting assembly Apr. 20, 2004
5967405 Megaphone cup Oct. 19, 1999
5117463 Speaker system having directivity May. 26, 1992
4893695 Speaker system Jan. 16, 1990
4703829 Collapsible and portable megaphone Nov. 3, 1987
4433750 Synthetic horn projector with metal insert Feb. 28, 1984
4369857 Loudspeaker and horn combination Jan. 25, 1983
4206831 Loudspeaker coupler Jun. 10, 1980
4125218 Megaphone-cup Nov. 14, 1978
4063614 Combination loudspeaker and sign holder Dec. 20, 1977
3982607 Loudspeaker cabinet having an integrally constructed horn Sep. 28, 1976











 
 
  Recently Added Patents
Assembly for providing an aligned stack of two or more modules and a lithography system or a microscopy system comprising such an assembly
Stereoscopic editing for video production, post-production and display adaptation
Image-monitoring method for electroporation treatment and as associated image-monitoring appliance
Solution based precursors
Drive apparatus
Lithographic apparatus and device manufacturing method
Systems and methods for controlling phasing of advancing substrates in absorbent article converting lines
  Randomly Featured Patents
Connector assembly and male-side connector
Synthetic herpes simplex viruses type-1 for treatment of cancers
Turbine blade with multiple near wall serpentine flow cooling
Rotary drying drum
History-based carry predictor for data cache address generation
Process for oxidizing vinylbenzene compounds to .beta.-phenylaldehydes
Phlegmatized red phosphorus
Methods of forming electrical components and memory cells
Dinner plate or similar article
Force control method for a bar feeder of a lathe