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Class Information
Number: 114/63
Name: Ships > Displacement-type hull (e.g., specific aftbody, etc.) > Having specific bottom > Flat bottom
Description: Inventions in ship"s forms in which flat bottoms are used with or without keels or in which the bottom is nearly flat or horizontal.

Patents under this class:

Patent Number Title Of Patent Date Issued
7752986 Boat hull design Jul. 13, 2010
6772706 Personal watercraft with rear handle Aug. 10, 2004
6158369 Transonic hydrofield and transonic hull Dec. 12, 2000
6044789 Fabric skinned inflatable dory Apr. 4, 2000
5694877 Ship docking vessel Dec. 9, 1997
5676087 Watercraft hull Oct. 14, 1997
5605480 Easily maneuverable vessel propelled by eight jets and sails Feb. 25, 1997
5551900 Aquatic vegetation cutter Sep. 3, 1996
5235926 Anti-skid device for flat-bottomed boats Aug. 17, 1993
5150661 Retractable steering device for cargo barges that increases maneuverability by providing a pivot point or points when altering course Sep. 29, 1992
4928613 Retractable steering device for cargo barges that increases maneuverability by providing a pivot point or points when altering course May. 29, 1990
4917035 Monohull sailboat with enlarged deck area Apr. 17, 1990
4782779 Barge lattice skegs Nov. 8, 1988
4753184 Hull with convexly down-step plane Jun. 28, 1988
4569302 Barge dagger skegs Feb. 11, 1986
4517911 Flotation device May. 21, 1985
4369725 Method and means for increasing the maneuverability of a ship in ice-covered waters Jan. 25, 1983
4351255 Ice-breaking ship Sep. 28, 1982
4337544 Sport fishing boat Jul. 6, 1982
4227272 Supportive framework for a boat Oct. 14, 1980
4217844 Barge dagger skegs Aug. 19, 1980
4069782 Ship structure Jan. 24, 1978
4011826 Marine vessel with vertical annular walls Mar. 15, 1977
4002131 Boat hull construction Jan. 11, 1977
3943586 Dory Mar. 16, 1976
3934531 Ocean going cargo transport system Jan. 27, 1976
3931780 Icebreaker vessel Jan. 13, 1976

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