Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 5209050 | Mower wheel assembly The present invention relates to the wheel assembly of mowers, particularly to mulching mowers. In the preferred embodiment, each wheel assembly includes a clearing disc sandwiched between a pair of support wheels. The support wheels support the weight of... | 05/11/1993 |
| 5029945 | Vehicular traction wheel A traction device including a stationary plate mounted to a housing of an associated drive wheel of a vehicle, with a rotary member mounted rotatably relative to the stationary plate, with spike members mounted relative to the rotary portion extensible up... | 07/09/1991 |
| 4266832 | Vehicle wheel anti-slip device An anti-slip device is operated automatically by a driver from his cab by a hydraulic or manual system. Detachable blades each pivotable around a shaft are disposed on each drive wheel. In order to use the blades they must emerge and project from the peri... | 05/12/1981 |
| 4154488 | Traction device for cross-country vehicles and machines A cross-country vehicle includes a wheel provided with an outer layer of resilient material having a plurality of circumferentially disposed protruding teeth. A track is provided about the wheel and has a plurality of transverse bars connected to one anot... | 05/15/1979 |
