Acoustic reflex ear protective system
United States Patent 3068319
US Patent References:
Means for binaural hearing
- - 2942070


Inventors:
Fletcher, John L.
Riopelle, Arthur J.
Publication Date:
12/11/1962
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Assignee:
Fletcher, John L.
Riopelle, Arthur J.
Primary Class:
381/72
Other Classes:
42/106, 128/864, 600/28
International Classes:
A61F11/14; A61F11/00