Articulated boat rudders
United States Patent 2996031

Inventors:
Easter, Elmer W.
Publication Date:
08/15/1961
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Assignee:
DRAVO CORP
Primary Class:
114/167
Other Classes:
440/67, 440/43
International Classes:
B63H25/38; B63H25/06
US Patent References:
2201859Boat
2251133Flanking rudder
2784691Water craft hull tunnel and propeller arrangement
2812738Side entrance tunnel hull
Foreign References:
SE9433A
DE18366C
DE572422C