Patents for B63B 41 - Drop keels, e.g. centre boards or side boards (421)
10/2002
10/23/2002EP0750560B1 A yacht
09/2002
09/26/2002DE10213447A1 Swing keel, for a boat, is on a swing carrier in a mounting at the mast or a floor rib to swing to the side in shallow water, with a locking mechanism to prevent an accidental swing movement
09/25/2002EP1242276A1 Way as acronym for wave avoidance yacht
09/24/2002US6453836 Sailboat keel with a rotatable secondary foil
08/2002
08/15/2002WO2002062657A1 Adjustable keel for sailboats
08/06/2002US6427619 Open-trough kayak leeboard kit
06/2002
06/04/2002US6397771 Retractable wing keel for sailboats
02/2002
02/26/2002US6349659 Sailboat rotatable keel appendage
02/20/2002EP1180082A1 Slidable and impact absorbing keel
01/2002
01/15/2002US6338308 Device for moving and controlling the keels of sailing yachts
12/2001
12/06/2001WO2001092096A1 Sailboat for sailing in shallow water
12/04/2001US6325009 Sailboat for sailing in shallow water
11/2001
11/01/2001WO2001081165A1 Device for varying a ship's draught resulting in providing a pendular keel enhancing moment of statical stability
10/2001
10/11/2001WO2001032500B1 Way as acronym for wave avoidance yacht
08/2001
08/30/2001US20010017098 Weighted daggerboard stabilizer for wind surfing apparatus
05/2001
05/23/2001EP0862531B1 Monohull water-borne craft
05/10/2001WO2001032500A1 Way as acronym for wave avoidance yacht
12/2000
12/07/2000WO2000073130A1 Slidable and impact absorbing keel
04/2000
04/27/2000DE19848764A1 Keel system for an outrigger boat has two keel blades on end swing mountings at the leeward side of the hull with a coupling for simultaneous manual operation
03/2000
03/29/2000EP0989056A2 Arrangement for moving and controlling the keels of sailing yachts
03/07/2000US6032603 Method and apparatus to increase the velocity of sailing vessels
03/07/2000US6032600 Weighted daggerboard stabilizer for wind surfing apparatus
11/1999
11/02/1999US5975974 Removable surf fin system
10/1999
10/19/1999US5967074 Keel for sail ships
09/1999
09/15/1999EP0941919A1 Retractable keel for sailboats
08/1999
08/19/1999DE19825930A1 Heeling reduction system for sailing boats
08/17/1999US5937777 Monohull water-borne craft
08/10/1999US5934214 Method of sailing a boat, and sailing vessel
06/1999
06/10/1999DE19857612A1 Hydrofoil boat with fin propulsion system
06/01/1999US5908005 Yacht
03/1999
03/18/1999DE19740048A1 Flat lifting keel for sailing boat
01/1999
01/07/1999DE19727803A1 Holding device for folding centre board, particularly of surf board
12/1998
12/02/1998EP0837817B1 Method of sailing a boat, and sailing vessel
10/1998
10/13/1998US5819678 Boat keel stabilizer system for trolling
09/1998
09/29/1998US5813890 Pivoting fin with elastic bias
09/22/1998US5809926 Lifting fin
09/22/1998US5809923 Apparatus for controlling the buoyancy and draft of a vessel
09/09/1998EP0862531A1 Monohull water-borne craft
08/1998
08/06/1998WO1998033701A1 Weighted daggerboard stabilizer for windsurfing apparatus
07/1998
07/29/1998EP0855339A2 Keel for sailing vessels
07/28/1998US5784976 Windsurfer apparatus
04/1998
04/29/1998EP0837817A1 Method of sailing a boat, and sailing vessel
04/08/1998EP0834451A2 Removable surf fin system
01/1998
01/07/1998EP0816219A2 Watercraft with a raisable keel
11/1997
11/20/1997DE19620104A1 Water craft
10/1997
10/23/1997WO1997038895A1 Improved keel for aquatic craft
09/1997
09/25/1997DE19610875A1 Inflatable emergency float for ship etc.
09/09/1997US5664979 Pivoting fin for watercraft
06/1997
06/26/1997WO1997022513A1 Monohull water-borne craft
06/19/1997DE19546471A1 Fin keel for boat
04/1997
04/22/1997US5622130 Heel control system for sailing yachts and sailing yacht hull
02/1997
02/20/1997WO1997006051A1 Method of sailing a boat, and sailing vessel
02/20/1997CA2229033A1 Method for sailing a boat, and sailing vessel
02/18/1997US5603277 Tack aback sailboat
02/06/1997DE19528796A1 Verfahren zum Betreiben eines Segelschiffes und Segelschiff A method of operating a sailing ship and sailing ship
01/1997
01/02/1997EP0750560A1 A yacht
10/1996
10/02/1996DE19510680A1 Wind drive device for single-hull ships
05/1996
05/09/1996DE19515114A1 Fin propulsion for muscle-powered water craft
04/1996
04/02/1996US5503097 For a watercraft
02/1996
02/27/1996US5493989 Adjustable fin box system
09/1995
09/28/1995WO1995025663A1 A yacht
09/28/1995CA2185432A1 A yacht
09/19/1995CA2119417A1 Sailing vessel
07/1995
07/11/1995US5431121 Sailboat keel hoist assembly
06/1995
06/01/1995DE4340028A1 Windward-travel system for sailing vessel
05/1995
05/23/1995CA2109685A1 Vaiable keel for sailing vessels (with the possibility to increase or decrease alternatively)
05/02/1995US5410977 Rudderless sailboat
03/1995
03/02/1995DE4328936A1 Sailing boat with a retractable pivoting centreboard
10/1994
10/06/1994DE4310471A1 Centreboard, which can be filled with water, as trimming ballast for sailing yachts
10/04/1994US5351638 Keel assembly for a sailboat
05/1994
05/24/1994US5313905 Twin wing sailing yacht
03/1994
03/03/1994DE4229101A1 Keel construction for sailing boat - has guide device on underside, extending across length of boat in arc formation, keel has drive for moving inside guide device
12/1993
12/28/1993US5273471 Fin for a windsurf board
10/1993
10/14/1993WO1993019978A1 Foil device
06/1993
06/17/1993DE4140817A1 Folding keel for sailing boat - is split into two halves about central plane to sit on mud berth
05/1993
05/26/1993EP0542953A1 Improvements in or relating to multi-hull vessels with fixed sails
02/1993
02/18/1993DE4226545A1 Keel withdrawal and angle adjuster for sailing vessel - uses cranks to lower, rotate and adjust angle of keel from within boat.
01/1993
01/05/1993US5176096 Assembly for fastening a fin to a sailboard
11/1992
11/17/1992US5163377 Sailing yacht
10/1992
10/29/1992WO1992018376A1 Improvements in or relating to multi-hull vessels with fixed sails
10/06/1992US5152238 Split-hinged, winged, self-cradling shallow draft keel for sailing vessel
10/06/1992CA1308307C Foil arrangement for water-borne craft
08/1992
08/20/1992WO1992013758A1 Flexible tailored elastic airfoil section
03/1992
03/25/1992EP0476435A1 Watertight synthetic gland for the keel box and the keel, especially for surfboards
03/25/1992EP0232359B1 Sailing boat
12/1991
12/11/1991EP0460438A2 Fastening arrangement for a fin on a sailboard
10/1991
10/29/1991CA1291373C Steerable keel
08/1991
08/06/1991US5036783 Sailing yacht with a centerboard
07/1991
07/24/1991EP0374138A4 Flanged fin for watercraft
07/09/1991US5030151 Flanged fin for watercraft
06/1991
06/06/1991DE3939437A1 Yacht with device to counteract heeling over - which is formed by hinged flaps fitted in openings in keel
06/06/1991DE3939435A1 Damping pitching motion of yacht - involves elastically flexible float attached to stern end of keel
05/1991
05/29/1991DE3939014A1 Hinged fins attached to keel of sailing ship - can be held at angle to generate hydrodynamic forces to assist in ship propulsion
04/1991
04/23/1991US5009178 Self activating keel
03/1991
03/26/1991US5002001 Blade-like profiled device for acting on a gaseous or liquid fluid flow
02/1991
02/20/1991EP0412965A1 Keel for boats
02/07/1991WO1991001249A1 Support structure for a lateral appendage to a small craft
01/1991
01/30/1991EP0232252B1 A steerable keel
11/1990
11/15/1990WO1990013477A1 Sail-wing and controls for a sail craft
09/1990
09/26/1990EP0388403A1 Fin, keel, or leeboard for sailing vessels, boats and surf boards equipped with a sail
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