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 |
| 7648079 | Grooved rail Provided is a grooved rail for rail vehicles having flanged wheels, the grooved rail including a rail head provided with a running rail, a flange groove, and a counterrail, in addition to a rail web, a rail base, and lateral rail chambers extending between the rail ... | 01/19/2010 |
| 5513797 | Installation of rail tracks in roadways A track rail having a groove for flanges of rail vehicle track wheels in an upper surface of the rail and having a central bar portion and flanges extending integrally sideways from the top of the bar portion is inserted in a recess preformed in the roadw... | 05/07/1996 |
