Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 6330757 | Footwear with energy storing sole construction A sole is adapted for use with an article of footwear to be worn on the foot of a person while the person traverses along a support surface. This sole is operative to store and release energy resulting from compressive forces generated by the person's wei... | 12/18/2001 |
| 6327795 | Sole construction for energy storage and rebound A sole construction for supporting at least a portion of a human foot and for providing energy storage and return is provided. The sole construction includes a generally horizontal layer of stretchable material, at least one chamber positioned adjacent a ... | 12/11/2001 |
| 5937544 | Athletic footwear sole construction enabling enhanced energy storage, retrieval and guidance Athletic footwear has an upper and sole. The sole has heel and midfoot regions and metatarsel and toe regions which include a foundation layer of semi-flexible material attached to the upper and defining a plurality of stretch chambers, a stretch layer at... | 08/17/1999 |
