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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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