EAR PROTECTOR SUSPENSION DEVICES AND THE COMBINATION WITH HEADGEAR
United States Patent 3461463

Inventors:
Beguin, Fred P.
Publication Date:
08/19/1969
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Assignee:
AMERICAN OPTICAL CORP
Primary Class:
2/423
Other Classes:
381/376, 2/209
International Classes:
A42B3/16; A42B3/04; A42B1/08; H04R1/10
Foreign References:
GB191210041A
FR1145964A




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