Patents for B63B 41 - Drop keels, e.g. centre boards or side boards (421)
10/1980
10/15/1980EP0017231A1 Vertically movable centre board for a surf sail board
04/1980
04/22/1980CA1075977A1 Barge dagger skegs
01/1980
01/23/1980EP0006912A1 Keels
10/1979
10/02/1979CA1063308A1 Process for reinforcing plastic material and products therefrom
09/1979
09/11/1979US4167050 Vertical stabilizer for kayak
08/1979
08/21/1979CA1060722A1 Sailing vessels
03/1979
03/22/1979WO1979000151A1 Keels
02/1979
02/13/1979CA1048350A1 Hydrofoil vessel
10/1978
10/03/1978US4117797 Mast and keel movement for sailing vessels
02/1978
02/21/1978US4074646 Variable foil keel and sail boat
01/1978
01/10/1978US4067280 Sailboat control apparatus
12/1977
12/06/1977US4061104 Hydrofoil vessel
08/1977
08/30/1977US4044703 Sailboat control apparatus
08/30/1977US4044416 Surfboard with adjustable fin
06/1977
06/14/1977US4029037 Process for reinforcing plastic material and products therefrom
12/1976
12/14/1976US3996875 Intregral hydraulic pump and wheel steering mechanism for sailboats
12/14/1976US3996872 Hydrofoil vessel
08/1976
08/03/1976US3972300 Sailing craft
07/1976
07/13/1976US3968765 Rotatable-mounting apparatus for sails
04/1976
04/20/1976US3951090 Hydraulic system for raising and lowering keel
03/1976
03/30/1976US3946693 Removable inboard rudder
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