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Communications
Class Information
Number:
181/127
Name:
Acoustics
>
Anatomic or prosthetic relation
> Dentiphone
Description:
Subject matter wherein the acoustical device is held or positioned in the mouth, generally by the teeth.
Patents under this class:
Patent Number
Title Of Patent
Date Issued
5877460
Device for talking underwater
Mar. 2, 1999
5493079
Vocal communication snorkel
Feb. 20, 1996
5168131
Apparatus and method for controlling an elevator
Dec. 1, 1992
4527657
Tapered tube impedance matching underwater voice communicator with bubble silencer
Jul. 9, 1985
4071110
Underwater voice communicator
Jan. 31, 1978
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