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 |
| 7165774 | External wheeled heeling apparatus and method An external wheeled heeling apparatus for walking and running and transitioning to rolling on a surface is provided. The apparatus includes a sole having a forefoot, an arch and a heel portion provided with a first side of the heel portion and a second side of the h... | 01/23/2007 |
| 7165773 | Heeling apparatus and method A heeling apparatus includes a shoe with a unique feature in the heel that allows one to walk, run, or roll seamlessly. The appearance is that of normal footwear because of the covert wheel assembly. The stealth wheel in the heel gives one the ability to roll or sli... | 01/23/2007 |
| 7059613 | Personal transportation device for supporting a user's foot having multiple transportation attachments A personal transport device including a transportation attachment, a foot platform situated above the transportation attachment and at least one fastener connecting the foot platform to the transportation attachment. The foot platform has two parallel extending surf... | 06/13/2006 |
| 6979003 | Heeling apparatus and method A heeling apparatus includes a shoe with a unique feature in the heel that allows one to walk, run, or roll seamlessly. The appearance is that of normal footwear because of the covert wheel assembly. The stealth wheel in the heel gives one the ability to roll or sli... | 12/27/2005 |
| 6902173 | Frame for a skate, and a skate having such frame A frame for a skate, and a skate having a frame, the frame including a lower longitudinally elongated member for supporting the wheels of the skate, a housing at opposite ends of the elongated member, each housing demarcated by a pair of lateral walls between which ... | 06/07/2005 |
| 6698776 | Skateboard with simulated snowboard response A skateboard for use on a hard surface, configured to simulate the response of a snowboard, has a support platform to which sets of wheels are mounted. The wheels have successively decreasing diameters mounted on a common axle. The wheels of successively ... | 03/02/2004 |
| 6568695 | All terrain riding assembly having braking capabilities An all-terrain riding assembly comprised of a body member, including a supporting surface for feet of the user disposed between a front housing member having a rotatably mounted roller member and a rear housing member having a rotatably mounted, cylindric... | 05/27/2003 |
| 6299182 | Flexible skate A skate including a boot having a toe portion and a heel portion and wherein a first skate frame is attached to the heel portion and a second skate frame is attached to the toe portion wherein the frames move independently of each other from flexural move... | 10/09/2001 |
| 6254113 | All terrain riding assembly These and other objects of the present invention are achieved by an all-terrain riding assembly comprised of a body member, including a supporting surface for feet of the user disposed between a front housing member having a rotatably mounted roller membe... | 07/03/2001 |
| 6209894 | Summer sled A sled which will allow the user to experience the joy of sledding when there is no snow on the ground. The sled has wheel racks which are attached to the bottom of the base of the sled, and a plurality of oval wheels are attached to the wheel rack, and t... | 04/03/2001 |
| 6105977 | Roller contrivance intended for at least one foot A roller contrivance for use with at least one foot, such as a roller skate (1), skateboard, roller ski or the like, comprising a base frame (2) and at least one row of mutually sequential rollers (3) mounted to the base. At least one of these rollers (3)... | 08/22/2000 |
| 5947486 | Biodynamic roller skate A biodynamic roller skate with shoe (1) having sole (2) with front rollers (3) which are located in a forefoot area of the sole (2), and with rear rollers (4) which are located in a rear foot area of the sole (2). When the roller skate is used, all sectio... | 09/07/1999 |
| 5085445 | Skate cushioning device A roller skate has a compression spring for each of a plurality of rollers for passing over relatively rough terrain. A compression rod having a cylindrical top portion bears against the compression spring in each cylindrical hole placed vertically in the... | 02/04/1992 |
| 4898403 | Roller ski A roller ski that uses a wheel including a stationary member, a rotating tire member, and a liquid between the two to provide viscous damping to rotation of the tire member. The roller ski tire member can increase in width from a hub portion to a crown po... | 02/06/1990 |
| 4844492 | Two wheeled roller skate A two wheel roller skate has a roller that has two distinct surfaces consisting of a central part that is a curved surface and matching right and left frusto conical sections that have an angle that equals the degree of arc in the central part measured fr... | 07/04/1989 |
| 4138127 | Two wheel roller skate or the like A two wheel roller skate or the like having two wheels rotatably supported from a soleplate, one at the front and one at the rear thereof, the axes of rotation of the two wheels being normally parallel to each other. Each of the wheels is supported within... | 02/06/1979 |
