Boat propulsion device
United States Patent 1953599

Inventors:
Grimes, Charles P.
Publication Date:
04/03/1934
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Assignee:
Grimes, Charles P.
Primary Class:
416/62
Other Classes:
440/71, 416/74, 440/53, 416/120
International Classes:
B63H20/00; B63H20/06