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| Patents Granted on 1989-09-12 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,866,319 | Sep. 12, 1989 | M.W. Crutchfield | Erasing machine | draftsman | |
| 4,866,643 | Sep. 12, 1989 | W. Dutler | Method for Automatic Compensation of Probe Offset in a Coordinate Measuring Machine | coordinate measuring machines | |