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| Number | Title | Issue Date |
| 7354326 | Personal watercraft A personal watercraft is disclosed comprising a pair of longitudinally connected pontoons suitable for supporting a user on the surface of a body of water. A slip-joint comprising a pair of concentric cylinders, one attached to each pontoon, provides desired lateral... | 04/08/2008 |
| 7089875 | Gliding board for sports activities on water, snow, sand lawn and the like The invention relates to a gliding board for sports activities on water, snow, sand, lawn and the like, comprising a body resembling a board, which is equipped with a drive motor, wherein a self-supporting tank for the drive motor covering a large surface of the str... | 08/15/2006 |
| 5607331 | Water walking apparatus A float member has a top surface, a bottom surface, a front end and a rear end. A pair of elongated chambers extend in the float member between the top surface and the bottom surface. Each elongated chamber has respective openings at the top surface and b... | 03/04/1997 |
| 5429064 | Boat A water borne boat is propelled by manually energized water pumps that propel the boat by induction and reaction forces, the water pumps being manually energized by a person standing on drive members of the pumps, which are operated in the manner of a tre... | 07/04/1995 |
| 4850907 | Air motor systems for small boats An air motor for small manually powered recreational boats. The overall system includes a manually powered pump which supplys pressurized air to accumulator tanks through check valves, a throttle to pass selected quantities of pressurized air from the tan... | 07/25/1989 |
| 4521200 | Surfboard type boat convertible into sailboat or buoy A surfboard type boat convertible into a sailboat or buoy and comprising a circular floating board enclosed by a shell of polyethylene and containing foamed polystyrene. A cone-shaped keel likewise filled with foamed polystyrene is provided on the lower s... | 06/04/1985 |
| 4246861 | Buoyant craft A buoyant craft, such as a boat or raft, propelled by a water jet thrust of high efficiency. Such thrust is provided by a wedge shaped chamber, such as one including a substantially flat plate pivotally mounted forwardly and on the underside of the craft ... | 01/27/1981 |
| 4158245 | Swimming device A swimming device has a body platform with straps for the arms and body of a swimmer. Cylinders extend longitudinally on the platform and are open at their forward ends and have restricted outlet nozzles in the rear. Pistons are slidably mounted in the cy... | 06/19/1979 |
| 3971330 | Propulsion pump for water borne vessels A vertically elongated pump has an intake port at its bottom and a rearwardly directed exhaust port near the bottom. A vertical rod is attached to a piston sliding inside the pump that sucks water in through the intake port and pushes it out the exhaust p... | 07/27/1976 |
