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FAIL-SAFE CIRCUIT
US 3,491,265 A
Filed
: 06/14/1966
Issued
: 01/20/1970
Est. Priority Date
: 06/14/1966
Status: Expired due to Term
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Current Assignee
Elmer E. Prothero
Original Assignee
Elmer E. Prothero
Inventors
Prothero, Elmer E.
Application Number
US04/557,503
Time in Patent Office
1,316 Days
Field of Search
US Class Current
361/102
CPC Class Codes
H01H 47/002
Monitoring or fail-safe cir...
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