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Radio-frequency navigation system
US 2,578,980 A
Filed
: 02/02/1948
Issued
: 12/18/1951
Est. Priority Date
: 03/07/1946
Status: Expired due to Term
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Current Assignee
Joseph O'Brien William
Original Assignee
Joseph O'Brien William
Inventors
JOSEPH O'BRIEN WILLIAM
Application Number
US03/005,878
Time in Patent Office
1,415 Days
Field of Search
US Class Current
342/387
CPC Class Codes
G01S 1/02
using radio waves G01S19/00...
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