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Method and means for determining distance by means of radiated waves
US 2,147,810 A
Filed
: 12/10/1937
Issued
: 02/21/1939
Est. Priority Date
: 12/10/1937
Status: Expired due to Term
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Current Assignee
Andrew Alford
Original Assignee
Andrew Alford
Inventors
Alford, Andrew
Application Number
US02/179,081
Time in Patent Office
438 Days
Field of Search
US Class Current
342/122
CPC Class Codes
G01S 13/36
with phase comparison betwe...
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