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Emergency signaling device
US 2,874,292 A
Filed
: 05/21/1956
Issued
: 02/17/1959
Est. Priority Date
: 05/21/1956
Status: Expired due to Term
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Current Assignee
John Varley
Original Assignee
John Varley
Inventors
Varley, John
Application Number
US03/586,159
Time in Patent Office
1,002 Days
Field of Search
US Class Current
331/47
CPC Class Codes
H04L 15/22
Apparatus or circuits for s...
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