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Steering wheel
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Patent number 4,884,469
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Issue date Dec 5, 1989
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Detroit Marine Engineering Corporation
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R. Alexander Wrigley
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B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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Porthole construction
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Patent number 4,669,410
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Issue date Jun 2, 1987
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Detroit Marine Engineering, Inc.
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George Howell
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Adjustable boat seat
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Patent number 4,544,199
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Issue date Oct 1, 1985
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Detroit Marine Engineering, Inc.
-
Robert A. Wrigley
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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-
Gland nut retaining means
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Patent number 4,046,481
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Issue date Sep 6, 1977
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Detroit Marine Engineering Corporation
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Louis T. Horvath
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Stowing hinge for boat ladder
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Patent number 3,980,157
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Issue date Sep 14, 1976
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Detroit Marine Engineering Corporation
-
Robert A. Wrigley
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Ladder
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Patent number 3,944,024
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Issue date Mar 16, 1976
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Detroit Marine Engineering
-
Charles L. Adas
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT