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Helmet communication system
US 2,942,072 A
Filed
: 06/17/1957
Issued
: 06/21/1960
Est. Priority Date
: 06/17/1957
Status: Expired due to Term
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Current Assignee
Clairdon E. Cunningham
Original Assignee
Clairdon E. Cunningham
Inventors
Cunningham, Clairdon E.
Application Number
US03/666,046
Time in Patent Office
1,100 Days
Field of Search
US Class Current
379/430
CPC Class Codes
A42B 3/30
Mounting radio sets or comm...
H04M 1/05
specially adapted for use o...
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