Method and means for locating concealed bodies
United States Patent 2238072

Inventors:
Nelson, Dale H.
Buckingham, William D.
Publication Date:
04/15/1941
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Assignee:
WESTERN UNION TELEGRAPH CO
Primary Class:
324/67
Other Classes:
405/173, 324/243, 324/345, 324/326, 102/406
International Classes:
G01V3/08