"I think there is a world market for maybe five computers."
Thomas Watson, chairman of IBM ; 1943
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| Number | Title | Issue Date |
| 5277257 | Depth control mechanism for an implement A chain is connected at its distal end to the pin at the rod end of a cylinder on an implement lift and depth control assembly. An intermediate portion of the chain is trained around a gear which rotates about the axis of the pin connecting the base end o... | 01/11/1994 |