Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7604522 | Hydrofoil bike apparatus The hydrofoil bike apparatus has a top frame member, a fork tube with a steerable fork within, a handlebar affixed atop the fork, a steered first foil affixed to the fork bottom, a center support first end affixed below the top frame member, a second foil disposed o... | 10/20/2009 |
| 7240908 | Pogo-ski This invention relates to recreational equipment for use on a sliding surface, such as skis, snowboards, or other equipment for use by a person such as a skier, snowboarder or water-skier. This invention provides a pogo-ski comprising a ski and a post thereon which ... | 07/10/2007 |
| 7232355 | Flying ski The present flying ski is designed to be towed behind a conventional powered watercraft with the rider in a seated position. The flying ski comprises an elongate board and a seat that extends generally perpendicular to and upward from the board to support the seated... | 06/19/2007 |
| 7097523 | Flying ski The present flying ski is designed to be towed behind a conventional powered watercraft by a standard ski tow rope or similar device having a handle that can be held by a human rider. In use, the rider is seated on the seat of the flying ski and towed by the watercr... | 08/29/2006 |
| 6786785 | Flying ski The present flying ski is designed to be towed behind a conventional powered watercraft utilizing a standard ski tow rope or similar device having a handle that can be held by a human rider. In use, the rider is seated on the seat of the flying ski and towed by the ... | 09/07/2004 |
| 6758709 | Adjustable plate binding assembly A water sports device for supporting a seated human rider while the rider and the device are towed behind a powered water craft, the device including an elongated board having a front end and a back end to which is secured a seat for supporting the buttocks of the r... | 07/06/2004 |
| 6551158 | Adjustable angled rear wing A water sport device for supporting a seated human rider while the rider and the device are towed behind a powered water craft, including an elongate board to which a seat and foot holder are secured, an elongate hydrofoil extending downward from the boar... | 04/22/2003 |
| 6443786 | Flying ski The improved flying ski is designed to be towed behind a conventional powered watercraft utilizing a standard ski tow rope or similar device having a handle that can be held by a human rider. In use, the rider is seated on the seat of the flying ski and t... | 09/03/2002 |
| 6234856 | Flying ski The improved flying ski is designed to be towed behind a conventional powered watercraft utilizing a standard ski tow rope or similar device having a handle that can be held by a human rider. In use, the rider is seated on the seat of the flying ski and t... | 05/22/2001 |
| 6179676 | Shock tower A water sport device for supporting a seated human rider while the rider and the device are towed behind a powered water craft, including an elongate board to which a seat and foot holder are secured, an elongate hydrofoil extending downward from the boar... | 01/30/2001 |
| 6135047 | Kit for non-permanently converting a stand up PWC into a sit down A hull and seat assembly configured to be easily installed, secured and operated on production stand up PWC. The hull assembly (21) increases buoyancy and stability sufficient for multi-rider sit down operation while maintaining peak performance geometry.... | 10/24/2000 |
| 5700174 | Kneeboard The improved watersports board includes an outer shell that is filled with a rigid foam core. The outer shell includes a hull and a deck connected by a lip. The deck includes an integrated passenger contact area which in turn includes a strengthener for r... | 12/23/1997 |
| 5249998 | Water sports device A water sports device for supporting a seated human rider while the rider and the device are towed behind a powered water craft,, including an elongate board to which a seat and foot holder are secured, an elongate arm extending downward from the board an... | 10/05/1993 |
| 5100354 | Water sports device A water sports device for supporting a seated human rider while the rider and the device are towed behind a powered water craft, including an elongate board to which a seat and foot holder are secured, an elongate arm extending downward from the board and... | 03/31/1992 |
| 4865572 | Support seat for a ski A seat affixed to an extra wide ski for use primarily by paraplegics for the sport of water skiing. The seat is comprised of a tubular framework with a fabric sling-type seat which supports the rider in a forward angled seated position with the knees draw... | 09/12/1989 |
| 4808134 | Water ski boot A water ski boot comprising an upper and a sole. The upper includes respective toe and heel portions and the sole extends forwardly on the toe portion to provide a platform like portion extending generally to match the width of the upper. At least one elo... | 02/28/1989 |
| 4678445 | Water and snow wishbone shaped sled for one or two This is a sporting wishbone or Y-shaped board for supporting one or two riders in sliding over water or snow. The single bottom arm of the Y is as wide as the combined width of the two front arms of the Y plus the space in between, or approximately 16" to... | 07/07/1987 |
| 4629434 | Water gliding board This device consists of a water gliding board, similar in size, materials and configuration, to the existing (in 1984) "Knee Boards" but substantially improved with a deletion of the securing strap and with the addition of low knee shells, high knee-and-b... | 12/16/1986 |
| 4378747 | Aquatic recreation vehicle An aquatic recreation vehicle susceptible to use by one or a group of passengers or crew has an integrally formed hull having a plurality of surfaces. The hull is symmetrical about a central vertical symmetry plane which essentially divides the hull longi... | 04/05/1983 |
| 4361103 | Water sled device A highly maneuverable water sled device is disclosed which includes a joystick for controlling a rudder and an elevator. The base of the water sled device is provided with upwardly extending, hollow side, front and rear walls which are individually fillab... | 11/30/1982 |
| 4082304 | Ski-sled A ski-sled including an elongated ski-like runner that carries a seat and is equipped with control runners extending from the forward end thereof. The control runners are pivotably movable relative to the ski-like runner for steering purposes and are hing... | 04/04/1978 |
