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 |
| 7216687 | Cord tensioner A cord tensioner for the guide cords of a cord-guided window blind with movable rails holding a blind material. The cord tensioner, located at one of the rails, is a helically wound, extension spring with an integral extension limiter, extending axially through the ... | 05/15/2007 |
| 5678261 | Cushion device The present invention relates to a cushion device utilized for a bed, sofa, chair, or seat for a vehicle. The cushion device comprises an outer supporting member (20) having a shock absorbing space (10) and a cushion plate (30) to be elastically installed... | 10/21/1997 |
| 4452444 | Rebound exerciser A rebound exerciser for use by an individual in performing a variety of exercises having a frame formed of two symmetrical sections, and a fexible, resilient mat secured to the frame by a plurality of coil springs. The two symmetrical sections are pivotal... | 06/05/1984 |
| 3983585 | Concealed spring anchoring means for trampolines and method of producing same Cushioning pads are placed along the sides of a trampoline and have sufficient width to cover the ordinarily exposed springs. The sides of the trampoline frame are reinforced by an extra tube which assists in supporting the pads out of frictional contact ... | 10/05/1976 |
