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Ken Olsen, chairman and founder of Digital Equipment Corporation ; 1977
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| Number | Title | Issue Date |
| 3967377 | Precision positioning device for tool blades and the like Rotary motion is converted to linear motion by multiple thread sets which cooperate to provide precise control of the amount of rotary motion thus converted. As applied to a precision positioning device for a tool, blade or other object, the thread sets a... | 07/06/1976 |