Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 6112826 | Agricultural tractor This invention relates to controls of an agricultural tractor having a rotary cultivating mode and a draft control mode for performing a plowing operation. A conventional tractor has a controller for accelerating front wheels to be faster than rear wheels... | 09/05/2000 |
| 5172769 | Reversible tillage attachment for bidirectional mold board plow A tiller attachment for switchable bidirectional mold board plow which is adapted to be mounted onto the tool bar of the plow. The attachment includes a pair of axially spaced apart frame members which support arms joined at a right angles at a pivot poin... | 12/22/1992 |
| 4923014 | Agricultural implement with gas springs and control An agricultural implement is provided with trailing swing arms, each of which has a trailing wheel. Each swing arm is provided with a lifting device in the form of a piston operating in a cylinder. This lifting device establishes the height at which the i... | 05/08/1990 |
| 4549747 | Fifth wheel lifter/protector A device for protecting a fifth wheel in case the vehicle to which it is attached spins out or backs up for a considerable distance. The device comprises a pair of rods which project rearwardly and downwardly from the bracket mounted on the vehicle; when ... | 10/29/1985 |
| 4301872 | Plow with correlated pull bar adjustment and support wheel steering An articulated plow is provided with a laterally swingable pull bar (31) and steerable intermediate support wheels (46, 47) which are controlled by a hydraulic system providing correlated movement through parallel connected hydraulic jacks (37, 66). A lat... | 11/24/1981 |
