Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 4082266 | Electrical motor powered jump rope apparatus An electrical jump rope apparatus which revolves a loop or rope about a horizontal shaft to enable a user to jump as the rope loop revolves. The apparatus includes a stand fitted with a telescopic vertical support arm, the length of which is adjustable, w... | 04/04/1978 |
| 4049264 | Loop-the-hoop exerciser A combined amusement and exercising device of the skipping or jumping type is described. A base unit is worn by the user at approximately the waist level. A large, rigid hoop is threadibly engaged with a portion of the base unit whereby the loop may be pa... | 09/20/1977 |
| 4022462 | Apparatus for performing physical exercises Exercising apparatus similar to a jump rope is provided in the form of a hand held and hand powered single piece planar rigid frame with offset handlegrips to rotate the frame for continuous jumping exercises by one or several persons. The jump rope is pr... | 05/10/1977 |
| 3958802 | Jumping hoop A jumping hoop has a rigid U-shaped member which is held in the hand. A light flexible member is adjustably connected to opposite ends of the rigid member, forming a hoop. Ends of the rigid members are reentrantly bent to hold ends of the flexible member ... | 05/25/1976 |
