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| Patents for John J. Zimpel | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-1,237,376 | May 31, 1988 | D.R. Koplin, J.J. Zimpel | Automated part storage and machining system | workpiece changers and storage mechanisms | |
| 5,283,934 | Feb. 08, 1994 | J.J. Zimpel, D.R. Koplin | Automated Part Storage and Machining System | workpiece changers and storage mechanisms | |