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 |
| 6952990 | Land mine overpass tread design A land mine pressure fuse avoidance system has a base. A tread on the base contacts the ground around a land mine and independently distributes pressures around the ground. The tread has plural independent closed cell foam rubber elements. Each element is separated ... | 10/11/2005 |
| 4752105 | Vehicle traction A resiliently flexible endless articulated track member for a vehicle includes a series of transverse track elements held together bead-fashion in abutting relationship under compression by a plurality of tensile core elements under tension. The said trac... | 06/21/1988 |
| 4385652 | Endless track construction A plurality of sections are fitted together so that they fit around an uninflated tire and they are fastened together to form a rigid cylinder. The tire is then inflated thus holding the now solid rim or track in position. Each section includes a curved b... | 05/31/1983 |
| 4099794 | Track pad A track pad, a plurality of which when interconnected comprise an endless track for entrainment about a pair of tandem tired wheels, each track pad having a pair of spaced downwardly diverging transversely extending grouser bars and a single rigid link at... | 07/11/1978 |
| 4089565 | Removable track structure for wheeled vehicles A flexible track belt for removable, wraparound mounting on vehicle tires is comprised of a plurality of track sections which are linked together for pivotal movement with respect to each other about a single pivot pin connection to each track section. Ea... | 05/16/1978 |
