| Patents for B63H 1 - Propulsive elements directly acting on water (4,187) |
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| 05/05/1992 | US5110313 Separable blade assembly for rubber raft |
| 04/30/1992 | WO1992007189A1 Device for orienting rotor blades in a transverse fluid flow and applications |
| 04/16/1992 | WO1992006000A1 Improvements in or relating to drive units for watercraft |
| 04/15/1992 | EP0480888A1 A propulsion system for speedboats |
| 04/14/1992 | US5104292 Marine propeller with performance pitch, including five blade version |
| 04/09/1992 | DE4031336A1 Pedal driven miniature submarine - is propelled by rear fin mounted on end of swinging arm |
| 03/18/1992 | CN2099086U Dual range chopper type propeller |
| 03/17/1992 | US5096382 Ring-shrouded propeller |
| 03/11/1992 | EP0272319B1 A fluid powered motor-generator apparatus |
| 02/26/1992 | CN2097161U Boat propulsive device directly acting on water by hand |
| 02/20/1992 | WO1992002409A1 Fin-propelled boat |
| 02/19/1992 | CN1058739A Propeller line skeleton moulding method |
| 02/12/1992 | CN2095830U 空气螺旋桨 Air propeller |
| 02/06/1992 | WO1992001601A1 Propulsion for ships |
| 02/06/1992 | DE4024479A1 Manual propulsion for surf boards - has drive delivered by shaft to pair of hinged paddles below hull |
| 01/29/1992 | CN2094505U Improved boat rowing device |
| 01/28/1992 | US5083950 Apparatus for reducing cavitation erosion |
| 01/21/1992 | US5082423 Paddlewheel apparatus |
| 01/14/1992 | US5080621 Water walking device |
| 01/07/1992 | US5078632 Motorboat propeller |
| 12/24/1991 | US5074813 Method and arrangement on a vessel |
| 12/24/1991 | US5074376 Noise reduction method |
| 12/17/1991 | CA1293158C Method and arrangement on a vessel |
| 12/10/1991 | US5071378 Boat impeller wheel for minimizing the splashes therefrom |
| 11/27/1991 | EP0457812A1 Aquatic ski with human propulsion generated by deambulatory action |
| 11/21/1991 | EP0457746A1 Propeller combination with non-cupped blades for a boat propeller unit |
| 10/10/1991 | DE4106644A1 Shrouded propeller ship propulsion system - comprises drive shaft and propeller with hub screw vanes and central bore |
| 10/01/1991 | CA1289821C Screw propeller boss cap with fins |
| 09/17/1991 | US5049034 Propeller hub assembly |
| 09/13/1991 | WO1991013772A1 Vehicle propelling member and assembly |
| 09/13/1991 | CA2082312A1 Vehicle propelling member and assembly |
| 09/10/1991 | US5046975 Device with cavitational effect for propellers of watercraft with a planing or semiplaning keel |
| 09/03/1991 | US5044884 Safety propeller |
| 07/17/1991 | CN1013215B Low resistance submerged wing |
| 07/17/1991 | CN1013184B Adjustable propeller |
| 07/09/1991 | CA1285830C Marine propeller with optimized performance blade contour |
| 07/02/1991 | US5028210 Propeller unit with controlled cyclic and collective blade pitch |
| 06/26/1991 | CN2079601U Rotatary propulsive device for cargo tool on water |
| 06/13/1991 | WO1991008139A1 A propulsion device for a watercraft |
| 06/04/1991 | US5021015 Propulsion mechanism for a boat |
| 05/30/1991 | WO1991007313A1 Ship's propeller |
| 05/28/1991 | WO1991008300A1 Process for the preparation of vancomycin |
| 05/28/1991 | CA2045483A1 Process for the preparation of vancomycin |
| 05/23/1991 | DE4040412A1 Multi-blade marine propeller - has even-pitch blades in axial alignment on hub for continuous grip on water-flow |
| 05/16/1991 | WO1991006468A1 Folding propeller |
| 05/16/1991 | DE4033918A1 Propeller for ship for inland navigation - has two or more blade sets mounted one behind other |
| 05/08/1991 | EP0426604A1 New power ship and vessel and/or fluid propulsory systems with new thrust hydrodynamic reaction wheels and/or new thrust hydrodynamic axial flow reaction turbines |
| 05/08/1991 | EP0425723A1 Immersed propeller drive |
| 05/07/1991 | US5013269 Modular navigation vessel equipped with rotating floats |
| 05/02/1991 | DE3935754A1 Drive for mobile offshore installation - has ducted impeller with integral rotor inside shaped duct |
| 04/30/1991 | US5011583 Insulating propeller from anode |
| 04/24/1991 | CA2001357A1 Counter rotating propeller assembly for power boats |
| 03/26/1991 | US5002001 Blade-like profiled device for acting on a gaseous or liquid fluid flow |
| 03/19/1991 | US5000706 Rocker type propulsion mechanism for a boat |
| 02/27/1991 | EP0414627A1 Jet propulsion system for ships |
| 02/27/1991 | CN1049481A Longitudinal ship paddle |
| 02/27/1991 | CN1011771B Submersible |
| 02/14/1991 | DE3926584A1 Ship's propulsion system by surrounding water acceleration - uses four long, straight tubes along ship's hull, below water level for thrust generation |
| 02/13/1991 | EP0412216A1 Submersible |
| 02/07/1991 | DE3925387A1 Muscle powered propulsion system - generates jets of compressed air which are directed rearwards |
| 01/23/1991 | EP0408618A1 Rotary machine with non-positive displacement, for use as a pump, compressor, propulsion unit, generator or drive turbine |
| 01/16/1991 | EP0229124B1 Adjustable folding propeller |
| 01/09/1991 | EP0406451A1 Marine propulsion apparatus |
| 01/09/1991 | CN2068943U Bird wing shaped oar |
| 01/02/1991 | EP0405137A1 Propeller |
| 01/02/1991 | EP0404784A1 Balanced marine surfacing drive. |
| 12/11/1990 | US4976640 Marine propulsion device with elastomeric cushion |
| 12/04/1990 | US4975023 Low-resistance hydrofoil |
| 11/28/1990 | CN2066416U Pedal boat |
| 11/27/1990 | US4973275 Method and arrangement on a vessel |
| 11/15/1990 | DE3906847A1 Propelling and steering system |
| 11/13/1990 | US4969846 Man-powered boat propulsion device |
| 11/06/1990 | US4968273 Water-borne vessel |
| 10/30/1990 | US4966527 Composite blade construction for a propeller or rotor blade |
| 10/25/1990 | DE3912910A1 Jet-propulsion unit for boat or aircraft - comprises rotary jet pipe with internal auger or blades forming driving members |
| 10/24/1990 | CN2064344U Pedal boat |
| 10/06/1990 | WO1990011928A1 Propulsion system suitable for use on watercraft |
| 10/06/1990 | CA2049939A1 Propulsion system suitable for use on watercraft |
| 10/03/1990 | EP0389608A1 Wind-driven rotor |
| 09/26/1990 | EP0200749B1 Propellors for watercraft |
| 09/18/1990 | US4957413 Omnidirectional variable thrust propeller |
| 08/14/1990 | WO1990009310A1 Aquatic ski with human propulsion generated by deambulatory action |
| 08/14/1990 | CA2046296A1 Aquatic ski with human propulsion generated by deambulatory action |
| 08/02/1990 | DE3902367A1 A propulsion system operated by physical effort for watercraft, in particular for rowing boats of various design |
| 07/26/1990 | WO1990008061A1 Marine propulsion apparatus |
| 07/17/1990 | US4941802 Multi-bladed propulsion apparatus |
| 07/17/1990 | US4941423 Marine propulsion system |
| 06/27/1990 | EP0375403A1 Apparatus for reducing propeller cavitation erosion |
| 06/27/1990 | EP0375296A1 Noise reduction method |
| 06/26/1990 | US4936803 Propeller assembly |
| 06/26/1990 | US4936802 Manually powered watercraft |
| 06/21/1990 | CA2006081A1 Noise reduction method |
| 06/13/1990 | DE3841624A1 Hand propulsion system |
| 06/13/1990 | CN2058164U Combined propeller |
| 06/13/1990 | CN2058163U Recreation boat |
| 06/12/1990 | US4932908 Energy efficient asymmetric pre-swirl vane and twisted propeller propulsion system |
| 06/12/1990 | US4932350 Submersible |
| 06/05/1990 | US4931026 Jet propeller |
| 06/05/1990 | US4930987 Marine propeller and hub assembly of plastic |
| 05/31/1990 | CA2002590A1 Heater structure for aircraft propellers, helicopter rotors and the like |