Resources Contact Us Home
Browse by Category: Main > Communications
Class Information
Number: 181/20
Name: Acoustics > Speaking tubes > Combined mouth and ear pieces
Description: Mouthpieces and connected earpieces.

Patents under this class:

Patent Number Title Of Patent Date Issued
8434493 Adjustable mouth shield device May. 7, 2013
6768804 Adjustable microphone boom with acoustic valve Jul. 27, 2004
6625293 Microphone Sep. 23, 2003
6092620 Support frame Jul. 25, 2000
5533131 Anti-eavesdropping device Jul. 2, 1996
4926961 Hinged acoustical voice tube May. 22, 1990
4617431 Voice tube assemblies for post-auricle headsets Oct. 14, 1986
4505358 Voice communicator Mar. 19, 1985
4473130 Crash helmet with communication system Sep. 25, 1984
4459707 Ear protecting device Jul. 17, 1984
4118606 Acoustical voice transmitting headset Oct. 3, 1978
4090042 Acoustical communications headset May. 16, 1978
3993879 Acoustical communications headset Nov. 23, 1976

  Recently Added Patents
Method and apparatus for laser strip splicing
Picture quality control method and image display using same
Process for the production of electric energy by the excitation and capture of electrons from ground or water sources
Composite aircraft floor system
Control device
Verbena plant named `Duempsopicha`
Radio communication system, base station apparatus, terminal apparatus, and radio communication method for radio communication system
  Randomly Featured Patents
Three dimensional molded trim for utility openings in building structures
Method for manufacturing laminated electronic component
Actuator system comprising lever mechanism
Inflatable sole construction
Selective oxidation of 1,2-diphenyl-4-(2-phenylthio)ethyl)-3,5-pyrazolidinedione to the sulfinyl compound
Device and method for conducting a game of chance
Methods and systems of changing antenna polarization
Methods for detection of mutagens using luminescence gene
Non-delegable client requests to servers storing local information only
Carrier conveyor system