Resources Contact Us Home
Browse by Category: Main > Communications
Class Information
Number: 181/186
Name: Acoustics > Sound-modifying means > Intensifying horn > With sound-path restriction > Adjustable
Description: Subject matter wherein the structure can be altered or moved within the horn.

Patents under this class:

Patent Number Title Of Patent Date Issued
8213669 Rotary tweeter mounting arrangement for a speaker assembly Jul. 3, 2012
8191674 Acoustic loading device for loudspeakers Jun. 5, 2012
7178629 Electroacoustic public address unit with acoustic horn or waveguide Feb. 20, 2007
6766027 Elliptical flushmount speaker Jul. 20, 2004
6335974 Speaker system for television receiver with sound ducts and perforated panels Jan. 1, 2002
5837890 Jet engine test cell structure Nov. 17, 1998
5351220 Moving-coil electrodynamic electroacoustical transducer Sep. 27, 1994
5146434 Sound focusing device Sep. 8, 1992
4997058 Sound transducer Mar. 5, 1991
4419545 Electret transducer Dec. 6, 1983
4194590 Loudspeaker horn with adjustable angle of dispersion Mar. 25, 1980

  Recently Added Patents
Securing information by hiding identity on a computing device
Tag-based apparatus and methods for neural networks
Self cleaning rake
Rotating device
Trash bag retention device
Method and apparatuses for solving weighted planar graphs
Uplink interference mitigation method and apparatus
  Randomly Featured Patents
Method of creating wrinkle structures for reversible and irreversible applications
Tank tuning for band pass filter used in radio communications
Method of monitoring engine performance parameters of a gas turbine engine
Portable recorder
Safety lid
Structure and method to generate local mechanical gate stress for MOSFET channel mobility modification
Electrostatic discharge protection device
Device which is suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments
Garbage can
Power semiconductor device