| Patents for B63H 5 - Arrangements on vessels of propulsion elements directly acting on water (3,934) |
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| 05/02/1990 | CN1041732A Marine engaged double propellers and varied guide duct thereof |
| 05/01/1990 | US4921457 Marine propulsion device |
| 04/24/1990 | US4919630 Inboard drive system for a marine craft |
| 04/18/1990 | EP0363997A2 Counter-rotation pitch change system |
| 04/17/1990 | US4916947 Speed detecting device for marine propulsion unit |
| 04/10/1990 | US4915668 Boat tunnel apparatus and method |
| 04/10/1990 | CA1267572A1 Motorboat propeller guard for improved performance |
| 03/27/1990 | US4911664 Weed cutting and shredding attachment for trolling motor |
| 03/27/1990 | US4911663 Weed migration reduction system |
| 03/21/1990 | CN2054782U Energy-saving device for tracking regulating operation of shipping main engine |
| 03/15/1990 | DE3831136A1 Method for improving the efficiency and for reducing the cavitation, vibrations and underwater sound of turbo-machines, such as, for example, preferably underwater turbo-machines or drive machines, such as, for example, preferably single-stage or multi-stage propellers or turbine systems |
| 03/13/1990 | US4907994 L-drive |
| 03/08/1990 | WO1989008580A3 Energy efficient asymmetric pre-swirl vane and twisted propeller propulsion system |
| 02/20/1990 | US4902255 Weedguard for electric trolling motor |
| 02/14/1990 | EP0354402A1 Steering of vessels |
| 02/13/1990 | USRE33165 Boat hull with flow chamber |
| 02/06/1990 | US4898552 Outdrive lower unit housing-to-propeller hub bridging sleeve |
| 01/31/1990 | CN1006624B Turnable propeller device |
| 01/31/1990 | CN1006623B Combined energy-saving equipment with flow guide hood and thrust fins for ships |
| 01/31/1990 | CN1006622B Water guiding device effecting inlet currency of ship propeller |
| 01/30/1990 | US4897058 Marine device with improved propeller shaft bearing carrier arrangement |
| 01/10/1990 | CN1038686A Rotary machine with non positive displacement usable as pump, compressor, impeller, generater or turbine |
| 01/02/1990 | US4891026 Marine propeller including fish line trap |
| 01/02/1990 | US4891025 Arrangement in boat propeller installations |
| 12/28/1989 | WO1989012572A1 Propulsion efficiency improving apparatus for ships |
| 12/19/1989 | US4887983 Chain drive marine propulsion system with dual counterrotating propellers |
| 12/19/1989 | US4887982 Gear driven marine propulsion system with steerable gearcase and dual counterrotating propellers |
| 12/19/1989 | US4887540 Watercraft propulsion system |
| 12/14/1989 | WO1989011998A1 Double nozzle |
| 12/12/1989 | CA1263825A1 Propeller combination for a boat propeller unit |
| 11/29/1989 | CN1005907B 船舶 Shipping |
| 11/23/1989 | EP0342580A1 Brake device for a railroad vehicle axle using a disc brake |
| 11/02/1989 | WO1989010299A1 An arrangement in connection with azimuth propeller drive means for ships |
| 10/05/1989 | WO1989009342A1 Rotary machine with non-positive displacement, for use as a pump, compressor, propulsion unit, generator or drive turbine |
| 10/04/1989 | EP0335431A1 Flow guiding face(s) for a ship |
| 10/03/1989 | US4871332 Naval propulsion plant with hydraulic transmission |
| 09/28/1989 | DE3808859A1 Mounting of propeller shafts |
| 09/27/1989 | EP0334737A1 Rotary non-positive machine, applicable as pump, compressor, propellor, generator or motive turbine |
| 09/26/1989 | US4869694 Mounting device for marine propellers and the like |
| 09/21/1989 | WO1989008580A2 Energy efficient asymmetric pre-swirl vane and twisted propeller propulsion system |
| 09/21/1989 | DE3907494A1 Schiffsschrauben-antriebssystem Marine propeller drive system |
| 09/08/1989 | WO1989008050A1 Marine drive lower unit with sequentially loaded multiple thrust bearings |
| 09/08/1989 | WO1989008045A1 Balanced marine surfacing drive |
| 09/08/1989 | WO1989008044A1 Marine drive lower unit with thrust bearing rotation control |
| 08/08/1989 | US4854903 Parallel thrust propulsion system |
| 08/01/1989 | CA1258006A1 Steering and tilting means for marine propulsion device |
| 07/25/1989 | CA1257812A1 Weed guard for an electric trolling motor |
| 07/11/1989 | US4846741 Heel compensating steering arrangement for high speed boats |
| 07/04/1989 | US4843993 Ship having a stern screw and a method of operating the ship |
| 06/28/1989 | EP0321501A1 Boat propeller. |
| 06/20/1989 | US4840136 Propeller drive for boats |
| 06/14/1989 | CN2039299U Double-stern type motor barge |
| 06/13/1989 | US4838819 Marine propulsion unit |
| 06/08/1989 | DE3739988A1 Double marine propeller arrangement |
| 06/07/1989 | CN2038890U Protecting oar device |
| 05/24/1989 | CN1033031A Water craft with guide fin |
| 05/23/1989 | US4832642 Outboard boat propulsion installation |
| 05/23/1989 | US4832636 Marine drive lower unit with sequentially loaded multiple thrust bearings |
| 05/23/1989 | US4832634 Flow control and protector device for an outboard motor |
| 05/23/1989 | US4832633 Marine propulsion system |
| 05/23/1989 | US4832570 Boat propeller having counter-rotating screws and provided with a nozzle |
| 05/23/1989 | US4831954 Fin tab device for marine vessels |
| 05/09/1989 | US4828518 Double reverse revolution propeller apparatus |
| 05/03/1989 | DE3735409A1 Water-jet drive |
| 05/03/1989 | CN1004064B Streamlined open-water ship body for discharge type ship |
| 05/02/1989 | US4826461 Propeller protector |
| 04/20/1989 | WO1989003341A1 Improved retractable propulsor for boats |
| 04/19/1989 | EP0201500B1 A device in fluid pressure generators |
| 04/18/1989 | US4822308 Marine steering and propulsion system |
| 04/06/1989 | DE3732186A1 Propulsion arrangement for hydroplanes |
| 03/28/1989 | US4815260 Plant harvester |
| 03/15/1989 | EP0306499A1 Torque equalizer for contrarotary shafts |
| 03/02/1989 | DE3727322A1 Outboard motor set for water craft |
| 02/16/1989 | DE3726242A1 Contrarotating propeller |
| 02/14/1989 | US4804312 Flow guide for ship propellers |
| 01/31/1989 | US4801282 Marine propulsion units |
| 01/31/1989 | US4801281 Line cutter for outboard, inboard/outboard, and trolling motors |
| 01/31/1989 | US4801280 Stator for marine propeller |
| 01/25/1989 | EP0300683A1 Marine propeller |
| 01/24/1989 | CA1249185A1 Rotor system, particularly a boat propeller system |
| 01/17/1989 | US4798547 Fuel efficient propulsor for outboard motors |
| 01/04/1989 | EP0298053A1 Propulsor for boats having counterrotating propellers with nozzle |
| 01/03/1989 | US4795382 Marine drive lower unit with thrust bearing rotation control |
| 12/29/1988 | DE3720268A1 Ice-going vessel |
| 12/27/1988 | US4793773 Marine propelling apparatus |
| 12/22/1988 | DE3718954A1 Propeller arrangement, in particular for ship propulsion plants |
| 12/20/1988 | US4792314 Marine drive with floating spider differential assembly |
| 12/13/1988 | US4790782 Balanced marine surfacing drive |
| 12/06/1988 | US4789306 Marine propeller |
| 12/06/1988 | US4789303 Marine propeller carry handle and emergency spare kit |
| 12/06/1988 | US4789302 In a marine propulsion apparatus |
| 11/22/1988 | US4785756 Vessel having propeller arranged on vertical hull center plane |
| 11/15/1988 | US4784074 Dual walkway - central boat transom |
| 11/03/1988 | DE3712534A1 Flotation body for ships |
| 11/02/1988 | EP0289471A1 Arrangement for conducting air or exhaust gas into the swept field of a propeller |
| 11/01/1988 | US4781633 Retractable drive mechanism for marine vessels |
| 10/25/1988 | US4779551 Vessel having laterally offset propeller |
| 10/25/1988 | CA1243551A1 Self-propelled waterborne vessel |
| 10/19/1988 | EP0286895A1 Ship installation with the rudder propeller driven by a generally horizontal shaft line together with specific joints and propeller-shaft carriers thereto |
| 10/11/1988 | US4776819 Electrical control for trim/tilt of dual marine propulsion device |