Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7075195 | Electrical safety lockout mechanism for power tools and other hazardous machinery An improved electrical lockout mechanism includes a first connection means to a power source, and a second connection means to a power input terminal of the machine being protected. The machine includes a manually-operated ON/OFF switch. A switching element, which i... | 07/11/2006 |
| 5135056 | Plough apparatus Plough apparatus comprising a wheeled support structure (10) that supports a plough beam (20) that is pivotable in a horizontal plane about the center of the support structure between first and second plough beam positions. The plough beam (20) carries a ... | 08/04/1992 |
| 4219208 | Steerable wheeled assembly A steerable wheeled assembly for a vehicle such as a harvesting or windrowing machine of the type adapted to be drawn over crop rows in the ground is disclosed. The assembly includes rotatable vertical members and a horizontal axle member which are arrang... | 08/26/1980 |
