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| All Patents in class 700/89 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,947,667 | Mar. 30, 1976 | P.R. Parker | Circuit for Determining Tool Axis Offset Compensation | machine tool controls | |
| 4,074,177 | Feb. 14, 1978 | E.A. Olig | Methods and Apparatus for Automatic Movement of a Member to Precisely Indexed Positions Despite Signal Drift or Offset | metalworking machine mechanisms | |