Title:
Underwater viewers
United States Patent 2911878
Inventors:
Vernier, George E.
Publication Date:
11/10/1959
Export Citation:
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Assignee:
Vernier, George E.
Primary Class:
359/895
International Classes:
G02B23/22
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US Patent References:
2404556Underwater inspection and photographing device
1515065Submarine telescope
0804996N/A
Foreign References:
FR971182A