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System for displaying sonic echoes from underwater targets
US 3,012,222 A
Filed
: 08/08/1957
Issued
: 12/05/1961
Est. Priority Date
: 08/08/1957
Status: Expired due to Term
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Current Assignee
Julius Hagemann
Original Assignee
Julius Hagemann
Inventors
Hagemann, Julius
Application Number
US03/677,166
Time in Patent Office
1,580 Days
Field of Search
US Class Current
367/113
CPC Class Codes
G01S 1/72
using ultrasonic, sonic or ...
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