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
Low temperature pressure chamber unit, magnetic resonance device with a low temperature pressure chamber unit, and an attachment method to attach at least one add-on unit to an external housin
Redistribution layer (RDL) with variable offset bumps
Salts and polymorphs of desazadesferrithiocin polyether analogues as metal chelation agents
Method of stimulating tissue healing
Liquid crystal display panel
Monitoring apparatus for monitoring communication configurations of client devices
  Randomly Featured Patents
Buccal sample collector and container combined
N-methyl-D-aspartate (NMDA) receptor blockers for the prevention of atherosclerosis
Method and apparatus for image acquisition with adaptive compensation for image exposure variation
Voltage detection circuit and circuit for generating a trigger flag signal
Optical connector
Lateral sheet registration system
Ceiling runner
Hollow having plate welded in crown and striking face insert metal wood
Power supply configuration for an electric motor with four brushes
Out-of-order execution using encoded dependencies between instructions in queues to determine stall values that control issurance of instructions from the queues