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 |
| 7533747 | Wheel provided with driving means A traction assembly includes a wheel with a wheel shaft and traction means which, when in operation, exert torque on the wheel shaft. The traction assembly further includes a first electromotor coupled to a second electromotor, housings, stators, rotors, controllers... | 05/19/2009 |
| 7530415 | Wheel provided with driving means A traction assembly includes a wheel comprising a wheel shaft and traction means which, when in operation, exert torque on the wheel shaft, wherein the traction ratio, being the arm of the torque divided by the size of the radius of the wheel, is larger than 0.57. | 05/12/2009 |
