Title:
Underwater viewers
United States Patent 3081726
US Patent References:
Molded boat
- - 2376753

/2712139.html
- - 2712139

Under-water viewing device
- - 2717399

Manually propelled watercraft
- - 2998798


Inventors:
Betts, William M.
Requa, Reginald C.
Publication Date:
03/19/1963
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Assignee:
Betts, William M.
Requa, Reginald C.
Primary Class:
114/66
Other Classes:
359/895, 441/135
International Classes:
B63C11/49