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| Number | Title | Issue Date |
| 6743064 | High-speed paddle wheel catamaran A high speed paddle wheel catamaran includes a hull configuration having a main hull portion with at least one defined cavity area in a lower surface of the main hull and opposing side pontoons depending from the main hull portion. The depending side pontoons corres... | 06/01/2004 |
| 5487692 | Expandable wheel assembly An expandable wheel assemble for toy vehicles includes an axle, a first hub fixed to the axle, a second hub supported by the axle, and at least one web that spans between and is joined to the hubs, and has a central portion movable outwardly from the axle... | 01/30/1996 |
| 5205767 | Propelling system suitable for use on watercraft The main rotor (1) located at the bow (3) of the hull (4) is transverse to a vertical plane through the axis of the hull and consists of two or more units of cylindrical wheels (5), which are equipped with blades (17). Each unit of cylindrical wheels (5) ... | 04/27/1993 |
| 4872413 | Crayfish harvester boat apparatus A crayfish harvester boat apparatus having a principal boat portion open ended with side walls and a bottom portion defining a container and occupant space therewithin; a pair of rear drive wheels hingedly mounted to the rear portion of the boat, and a st... | 10/10/1989 |
| 4772237 | Paddle boat The present invention provides a paddle boat having a hull and a closed loop flexible member which is rotatably mounted to the hull while a pedal assembly longitudinally drives the flexible member around its loop. A plurality of substantially planar paddl... | 09/20/1988 |
| 4744781 | Amphibious toy vehicle An amphibious toy vehicle having paddles located within the wheels of the toy vehicle which can be extended outside the wheels in order to propel the vehicle forward and backward in water. A flotation chamber is provided at the bottom of the vehicle. A ge... | 05/17/1988 |
| 4591015 | Wheel propulsion device for air cushion vehicle A self-propelled air cushion vehicle includes a traction wheel device comprising at least two separate traction wheel units. Each traction wheel unit includes at least two consecutive wheels surrounded by a common caterpillar track, preferably two such wh... | 05/27/1986 |
| 4511338 | Water bicycle and detachable device therefor A water bicycle and a detachable device for converting a sail board into a water bicycle. The water bicycle has a flotation member and a frame removably mounted to the flotation member. Pedals are rotatably mounted to the frame. Paddle wheels are provided... | 04/16/1985 |
| 4473358 | Hydrofoil vessel A water-borne vessel propelled by a plurality of propulsion wheels each of which has a plurality of hydrofoil units disposed circumferentially around the drive shaft of the propulsion wheel on a support. In one embodiment, a tire for a land vehicle, is pr... | 09/25/1984 |
| 3954084 | Counter-rotating marine propulsion system A counter-rotating marine propulsion system employing a unique cam assembly which facilitates the alternate extension and retraction of a plurality of drive blades from a pair of counter-rotating spinwheels. The purpose of the retraction of the blades is ... | 05/04/1976 |
