| Patents for B63H 25 - Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements (4,728) |
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| 05/28/1991 | US5018469 Variable ratio steering helm |
| 05/21/1991 | US5016553 Vector steering control system |
| 05/16/1991 | DE3943537A1 Inflatable boat with paddle-wheels - is steered by disconnecting one or other paddle-wheel from pedal driven shaft |
| 05/08/1991 | DE3936899A1 Rudder for steering ship - is hollow with underwater gas discharge nozzle generating thrust |
| 04/17/1991 | EP0321501B1 Boat propeller |
| 04/11/1991 | DE4037681A1 Reduced drag rudder for ship - has two offset rudder blades with programmed steering w.r.t. sea conditions |
| 03/14/1991 | DE3928955A1 Paddle driven inflatable boat - has paddle blades which rotate through 90 deg. about radial fixing arm |
| 03/07/1991 | WO1991002679A1 Rudder for marine vessels |
| 03/05/1991 | CA1281091C Turning cord |
| 02/19/1991 | US4993976 Steering system for outboard motor |
| 02/06/1991 | EP0411898A1 A universal joint |
| 02/06/1991 | EP0411212A1 Device for steering a vessel |
| 01/24/1991 | DE4022205A1 Retractable rudder for sporting boat - is actuated by Bowden cable which passes through hollow rudder shaft |
| 01/17/1991 | DE4019935A1 Rudder with three separate control surfaces - are interconnected by pivoted links, and when actuated rotate abut parallel vertical axes |
| 01/08/1991 | US4982680 Hydraulic actuator |
| 01/01/1991 | US4981452 Surface drive outboard with improved transmission |
| 12/11/1990 | US4976639 Power steering mechanism for marine installations |
| 12/11/1990 | US4976638 Surface drive for marine craft having inboard engine |
| 12/05/1990 | CN2066843U Multi-function composite hydraulic steering engine |
| 11/22/1990 | EP0398414A1 A steering device for automatic steering of marine-craft |
| 11/07/1990 | EP0396518A1 Steering shock absorber for boat propeller drive units |
| 11/06/1990 | US4968274 Pedal operated watercraft |
| 10/31/1990 | EP0394320A1 A combined rudder and propeller arrangement. |
| 10/25/1990 | DE3913078A1 Dinghy rudder system with pin - has blade with forked head and pin supported in vertical bearing tube |
| 10/23/1990 | US4964821 Jet powered rigid inflatable boat with dead-man switch |
| 10/20/1990 | CA2014260A1 Steering shock absorber for boat propeller drive units |
| 10/16/1990 | CA1275203C Tiller extension hinge |
| 10/09/1990 | US4961392 Self-locking mechanical steering helm |
| 10/07/1990 | CA2013365A1 Pedal operated water cycle |
| 09/26/1990 | EP0375684A4 Kick-up rudder assembly |
| 09/12/1990 | EP0143851B1 Turning controller for z-type propulsion device |
| 09/11/1990 | CA1273850A1 Arrangement in a floating body for use during borehole-seismic measurements |
| 09/05/1990 | EP0385169A1 Rudder mechanism for ship |
| 09/05/1990 | CN2061551U Labour-saving safety manual steering engine |
| 08/22/1990 | EP0382903A2 Adjustment device for rudders, in particular for air or water craft |
| 08/21/1990 | US4949684 Starting system for internal combustion engine |
| 08/21/1990 | US4949662 Steering device for small sized jet propulsion boat |
| 08/21/1990 | US4949661 Mechanical rudder stoppers |
| 08/16/1990 | EP0290507B1 Manoeuvring device for boats |
| 07/31/1990 | US4944239 Active flap steering system for a towed vessel |
| 07/24/1990 | CA1271946A1 Marine propulsion device hydraulic system |
| 07/17/1990 | US4941421 Steering mechanism for aquatic vehicle |
| 07/04/1990 | EP0375684A1 Kick-up rudder assembly |
| 06/26/1990 | US4936243 Transom rudder seat |
| 06/21/1990 | DE3842172A1 High-performance rudder nozzle |
| 06/13/1990 | DE3841624A1 Hand propulsion system |
| 06/12/1990 | US4933617 Servo steering system for motor boats |
| 06/06/1990 | EP0371030A1 Adjustment assembly for valve spool and associated centering spring |
| 05/29/1990 | US4929203 Marine propeller drive system |
| 05/23/1990 | EP0368913A1 Marine power steering system |
| 05/01/1990 | US4920906 Keel structures for sailing vessels |
| 04/24/1990 | US4919630 Inboard drive system for a marine craft |
| 04/24/1990 | US4919629 Steering device for marine propulsion |
| 04/24/1990 | US4919064 Hydraulic system for ship rudder roll stabilization and steering |
| 04/19/1990 | WO1990003913A1 Improved trim-tab control system for power boats |
| 04/14/1990 | CA2000539A1 Trim-tab control system for power boats |
| 04/10/1990 | US4915051 Boat guidance stabilizer |
| 04/04/1990 | EP0360879A1 Steering-wheel for a ship, especially for a sailing-boat |
| 03/27/1990 | US4912465 Rudder position indicator |
| 03/21/1990 | EP0358686A1 Steering and manoeuvering system for water-borne vessels. |
| 03/13/1990 | US4908766 Trim tab actuator for marine propulsion device |
| 03/13/1990 | US4907521 Line lock |
| 02/27/1990 | CA1266204A1 Propeller system with electronically controlled cyclic and collective blade pitch |
| 02/21/1990 | CN1006878B Spade-shaped balance rudder for ship in particular |
| 02/14/1990 | EP0354402A1 Steering of vessels |
| 02/07/1990 | CN2052396U Rudder bar dutche for the barge |
| 01/30/1990 | CA1264991A1 Marine propulsion device power steering system |
| 01/25/1990 | DE3824443A1 Propulsion system for shallow-draught vessels |
| 01/23/1990 | US4895093 Manoeuvring device for boats |
| 01/09/1990 | US4892494 Power steering mechanism for marine installations |
| 01/04/1990 | DE3815792A1 Transverse rotor rudder for ships |
| 01/02/1990 | US4890570 Wind propelled sailing craft |
| 12/28/1989 | WO1989012741A1 Vane-type thrust vectoring nozzle |
| 12/27/1989 | CN1038246A Hydraulic driving device |
| 12/13/1989 | EP0346313A1 Hydraulic actuator |
| 12/12/1989 | US4886007 Servomechanism for sailboats |
| 12/05/1989 | US4884985 Elastically supported thruster structure |
| 11/02/1989 | WO1989010295A1 Improvements relating to sea anchors |
| 11/01/1989 | CN2046862U Head-rudder pedal propeller yacht |
| 10/12/1989 | DE3910891A1 Marine propulsion arrangement |
| 10/10/1989 | CA1262215A1 Active flap steering system |
| 09/21/1989 | DE3907494A1 Schiffsschrauben-antriebssystem Marine propeller drive system |
| 09/21/1989 | DE3808237A1 Control system for a water-craft, in particular for a sailing yacht |
| 09/19/1989 | US4867092 Rudder assembly |
| 09/05/1989 | US4862819 Wheel drive |
| 08/16/1989 | EP0328499A1 Propulsion device for steering of a boat and method of producing a hull for it |
| 08/08/1989 | US4855739 Marine autopilot apparatus |
| 08/08/1989 | US4854259 Improved trim-tab control system for power boats |
| 07/11/1989 | US4846741 Heel compensating steering arrangement for high speed boats |
| 07/06/1989 | DE3844219A1 Water-jet propulsion for propelling and steering watercraft |
| 07/04/1989 | US4843990 Retainer for marine drive steering linkage |
| 06/28/1989 | EP0321501A1 Boat propeller. |
| 06/15/1989 | WO1989005262A1 A combined rudder and propeller arrangement |
| 06/08/1989 | DE3739988A1 Double marine propeller arrangement |
| 05/30/1989 | US4834012 Tiller extension hinge |
| 05/23/1989 | US4832638 Integral propulsion and steering unit |
| 05/23/1989 | US4831954 Fin tab device for marine vessels |
| 05/09/1989 | US4827862 Aerodynamic control system for high speed motorboats |
| 05/02/1989 | US4825795 Sailing craft keel and rudder flow modifiers |
| 04/19/1989 | EP0312129A2 Sailing vessel |