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Propulsion system for boats
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Patent number 6,786,167
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Issue date Sep 7, 2004
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ISHIGAKI Company Limited
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Eiichi Ishigaki
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Jet propulsion pump
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Patent number 6,533,622
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Issue date Mar 18, 2003
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Hendrik Johannes Zwaan
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Circumferential circulation control system
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Patent number 5,687,670
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Issue date Nov 18, 1997
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The United States of America as represented by the Secretary of the Navy
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James Q. Rice
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Hydrojet
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Patent number 5,520,557
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Issue date May 28, 1996
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Schottel-Werft, Josef Becker GmbH & Co. KG
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Stefan Kaul
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Marine vessel thruster
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Patent number 5,072,579
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Issue date Dec 17, 1991
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Innerspace Corporation
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Calvin A. Gongwer
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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3893405
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Patent number 3,893,405
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Issue date Jul 8, 1975
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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3835805
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Patent number 3,835,805
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Issue date Sep 17, 1974
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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3543713
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Patent number 3,543,713
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Issue date Dec 1, 1970
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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2534817
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Patent number 2,534,817
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Issue date Dec 19, 1950
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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1519580
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Patent number 1,519,580
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Issue date Dec 16, 1924
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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1484881
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Patent number 1,484,881
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Issue date Feb 26, 1924
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT