Patents for B63B 41 - Drop keels, e.g. centre boards or side boards (421)
08/1990
08/21/1990US4949919 Foil
06/1990
06/27/1990EP0374138A1 Flanged fin for watercraft
06/26/1990US4936240 Structure for holding underwater projections
06/20/1990EP0373913A1 Improved keel
05/1990
05/29/1990US4928613 Retractable steering device for cargo barges that increases maneuverability by providing a pivot point or points when altering course
04/1990
04/03/1990US4913670 Blade-like profiled device for acting on a gaseous or liquid fluid flow
03/1990
03/28/1990EP0236409B1 Foil
01/1990
01/09/1990US4892493 Supplemental sailboat propulsion device
11/1989
11/28/1989US4883011 Hydrofoil keel
10/1989
10/05/1989WO1989009159A1 Sailing yacht
09/1989
09/12/1989CA1259199A1 Locking device for articles such as sailboards
08/1989
08/29/1989US4860680 Sailboat with leeway reducing keel
08/01/1989US4852507 Sail-wing and controls for a sail craft
07/1989
07/27/1989WO1989006621A1 Sailing yacht with centre-board device
07/20/1989DE3800163A1 Boat, in particular a sports (sporting) boat having a centre-board
07/13/1989DE3744582A1 Keel having wings arranged on both sides, in particular for ocean-going sailing yachts
07/13/1989DE3742846A1 Anti-capsize rudder
04/1989
04/20/1989WO1989003339A1 A sailing craft
04/04/1989US4817550 Stabilizing system for vehicles and method for using same
03/1989
03/14/1989US4811674 Foil arrangement for water-borne craft
02/1989
02/16/1989DE3824004A1 Floating arrangement with at least two hollow floating bodies joined together at a distance apart
02/16/1989DE3726439A1 Self-righting sailing boat
01/1989
01/17/1989US4798157 Drogue associated with a guidance system
01/10/1989US4796554 Sailboat
12/1988
12/01/1988WO1988009286A1 Fin, keel, or leeboard for sailing vessels, boats and surf boards equipped with a sail
10/1988
10/20/1988WO1988007883A1 Flanged fin for watercraft
09/1988
09/28/1988EP0283730A1 Aerodynamic body surrounded with air or water
09/22/1988DE3708159A1 Wing
09/21/1988EP0282830A2 Device in a gas or fluid stream with a split airfoil to increase the efficiency
08/1988
08/18/1988DE3713176A1 Sailing boat with winged keel
07/1988
07/26/1988US4759308 Sealing lip assembly for surfboards and sailboats
07/21/1988DE3700711A1 Spreader keel for ballast keel yachts
05/1988
05/26/1988DE3731022A1 Sailing yacht, yawl, or the like
04/1988
04/20/1988EP0264279A1 Foil assembly for water-borne craft
03/1988
03/03/1988DE3627925A1 Sailing vessel hull with steering fins and ballast trimming vanes
01/1988
01/26/1988US4721051 Tandem winch reels
01/14/1988WO1988000151A1 Keel for boats
12/1987
12/29/1987US4715306 Catamaran with a steerable centerboard apparatus and an improved deck joint
12/17/1987DE3619962A1 Device for reducing the lateral drifting of water craft in particular water craft which travel under sail
11/1987
11/09/1987EP0232252A4 A steerable keel.
11/03/1987US4703708 Steerable keel
10/1987
10/28/1987EP0242408A1 Sail boat
10/21/1987EP0241472A1 Fast self righting catamaran
09/1987
09/16/1987EP0236409A1 Foil.
09/02/1987EP0234824A2 Locking device for articles such as sailboards
09/01/1987US4690089 Boat with a raisable and lowerable keel
08/1987
08/19/1987EP0232359A1 Sailing boat.
08/19/1987EP0232252A1 A steerable keel.
08/18/1987US4686923 Sailboat keel having a cantilevered trailing edge flap
08/18/1987US4686922 Swing wing keel
07/1987
07/29/1987EP0230272A2 Hinge for drop keels of windsurf boards or sail boats
07/29/1987EP0229785A1 Splitwing keel
07/21/1987US4680949 Locking device for articles such as sailboards
04/1987
04/23/1987WO1987002320A1 Fast self righting catamaran
04/08/1987EP0216838A1 Device for a tractor-drawn center-board boat associated to a guiding system
03/1987
03/19/1987DE3531994A1 Keel design for sailing boats
03/12/1987WO1987001345A1 Foil
02/1987
02/12/1987WO1987000814A1 A steerable keel
02/12/1987WO1987000812A1 Sailing boat
01/1987
01/21/1987EP0209130A1 A sealing lip assembly for surfboards and sailboats
01/15/1987WO1987000136A1 Splitwing keel
10/1986
10/09/1986WO1986005757A1 Device for a tractor-drawn center-board boat associated to a guiding system
09/1986
09/09/1986US4610212 Fast self righting catamaran
07/1986
07/30/1986EP0189154A1 Boat with retractable keel
07/01/1986US4597348 Detachable keel for small boats
01/1986
01/14/1986US4563971 Retractable boat keel
12/1985
12/31/1985US4561371 Catamaran stabilization structure
09/1985
09/03/1985US4538539 Deformable shrouded water foil
08/1985
08/27/1985US4537143 Apparatus for the stabilizing of the direction of travel of watercraft, specifically a sword or fin for sailboards
05/1985
05/08/1985EP0140758A1 Adjustable centre board for sailing vessels
04/1985
04/30/1985CA1186181A1 Apparatus for the stabilizing of the direction of travel of watercraft, specifically a sword or fin for wind surfing boards
03/1985
03/12/1985US4503795 Sailing craft
06/1984
06/12/1984US4453484 Hull of a boat, provided with keel and rudder
03/1984
03/21/1984EP0102944A1 Lee-board for sailing boat
09/1983
09/27/1983US4406239 Sailboats, especially catamarans
08/1983
08/18/1983WO1983002760A1 Lee-board for sailing boat
08/16/1983US4398485 Device for detachably securing a centerboard to a sailboard or the like
06/1983
06/14/1983US4387657 Centerboard snubber
05/1983
05/18/1983EP0079113A1 A fin for a buoyant support
05/03/1983US4381725 Actuators for small sailing craft
04/1983
04/05/1983US4378748 Sailboat keel apparatus
03/1983
03/22/1983US4377124 Sailboat with an inclinable keel board
03/15/1983US4376416 Convertible sailboat/motorboat
01/1983
01/19/1983EP0069916A1 Means for stabilizing the direction of boats, especially keel or fin for wind surf-boards
10/1982
10/05/1982US4352335 Yacht keels
08/1982
08/24/1982US4345535 Sailboat trimming and stabilizing system
05/1982
05/27/1982WO1982001694A1 Sailing board with fixing device for a fin
05/04/1982US4327659 Minimum drag fluid reaction element and fluid control methods
04/1982
04/27/1982US4326475 Sailboat
04/20/1982US4325154 Surfboard fin
04/07/1982EP0049018A1 A sailing craft
02/1982
02/23/1982US4316425 Lifting keel for sporting sail boats
02/03/1982EP0045293A1 Boat with multiple hulls using sails
11/1981
11/26/1981WO1981003311A1 Floating arrangement,particularly multiple hull boat with sail propulsion
09/1981
09/08/1981CA1108481A1 Lifting keel for sporting sail boats
09/02/1981EP0034990A1 Fastening device for a fin or a centre-board on a surf-board
07/1981
07/28/1981US4280428 Non-heeling sailboat
07/23/1981WO1981001990A1 Body acting as a fin or center board of a sailing boat
07/22/1981EP0032223A1 Arrangement at a sailing-boat of a body serving as fin keel or centre board
12/1980
12/09/1980CA1091103A1 Vertical stabilizer for kayak
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