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Class Information
Number: 114/127
Name: Ships > Centerboards
Description: Vessels having boards, plates, planks, etc., placed longitudinally amidships and projecting in line with the keel or approximate thereto and adapted to be raised or lowered to increase the resistance-surface and prevent capsizing or sudden careening, thereby steadying and trimming the vessel, usually preventing making to leeward, and enabling a vessel to point or sail closer to the wind. Centerboards are usually short in length and move in a recess or casing formed in the bottom of the vessel and raised, lowered, or adjusted at will.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7244157 |
High-lift, low drag fin for surfboard and other watercraft |
Jul. 17, 2007 |
| 7198532 |
Fin attachment system |
Apr. 3, 2007 |
| 6991504 |
Surfboard fin mounting system |
Jan. 31, 2006 |
| 6935910 |
Watersport board fin assembly and methods of using same |
Aug. 30, 2005 |
| 6916220 |
Removable fin system |
Jul. 12, 2005 |
| 6247985 |
Surfboard box cover |
Jun. 19, 2001 |
| 5839700 |
Articulated fin |
Nov. 24, 1998 |
| 5649846 |
Pivotable fin system |
Jul. 22, 1997 |
| 5503097 |
High performance centerboard system |
Apr. 2, 1996 |
| 5480331 |
Flexible surfboard fin |
Jan. 2, 1996 |
| 5385495 |
Self adjusting water ski assembly |
Jan. 31, 1995 |
| 5342231 |
Self adjusting water ski assembly |
Aug. 30, 1994 |
| 5224435 |
Fin box assemblies for windsurfers |
Jul. 6, 1993 |
| 5195915 |
Sealing lip of plastic for the lower end of the inlet opening for a dagger board housing and dagger board, particularly of sailboards |
Mar. 23, 1993 |
| 5181678 |
Flexible tailored elastic airfoil section |
Jan. 26, 1993 |
| 5176096 |
Assembly for fastening a fin to a sailboard |
Jan. 5, 1993 |
| 5133681 |
Frangible sailboard fin retaining member |
Jul. 28, 1992 |
| 5129344 |
Actuating mechanism |
Jul. 14, 1992 |
| 5036785 |
Lightning protection installation on a boat |
Aug. 6, 1991 |
| 5030151 |
Flanged fin for watercraft |
Jul. 9, 1991 |
| 5022337 |
Lift producing device exhibiting low drag and reduced ventilation potential and method for producing the same |
Jun. 11, 1991 |
| 4949919 |
Foil |
Aug. 21, 1990 |
| 4940438 |
Surfboard with angularly related fins |
Jul. 10, 1990 |
| 4936243 |
Transom rudder seat |
Jun. 26, 1990 |
| 4805546 |
Retractable water board fin |
Feb. 21, 1989 |
| 4766830 |
Boat, especially a catamaran, with large deck space and collapsible frame |
Aug. 30, 1988 |
| 4759308 |
Sealing lip assembly for surfboards and sailboats |
Jul. 26, 1988 |
| 4759552 |
Lip gasket of a synthetic resin, especially for the daggerboard well of a sailboard |
Jul. 26, 1988 |
| 4561371 |
Catamaran stabilization structure |
Dec. 31, 1985 |
| 4493665 |
Hydrofoil |
Jan. 15, 1985 |
| 4421492 |
Adjustable fin system |
Dec. 20, 1983 |
| 4377124 |
Sailboat with an inclinable keel board |
Mar. 22, 1983 |
| 4341176 |
Air foil with reversible camber |
Jul. 27, 1982 |
| 4325154 |
Surfboard fin |
Apr. 20, 1982 |
| 4280433 |
Underwater appendages for vessels |
Jul. 28, 1981 |
| 4263866 |
Ski boat |
Apr. 28, 1981 |
| 4037279 |
Water ski |
Jul. 26, 1977 |
| 4029037 |
Process for reinforcing plastic material and products therefrom |
Jun. 14, 1977 |
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