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Voice actuated relay circuit
US 3,011,030 A
Filed
: 09/03/1957
Issued
: 11/28/1961
Est. Priority Date
: 09/03/1957
Status: Expired due to Term
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Current Assignee
Matthew P. Langendorf
Original Assignee
Matthew P. Langendorf
Inventors
Langendorf, Matthew P.
Application Number
US03/681,632
Time in Patent Office
1,547 Days
Field of Search
US Class Current
369/47.11
CPC Class Codes
G11B 15/1808
Driving of both record carr...
G11B 27/36
Monitoring, i.e. supervisin...
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