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| Patents for Donald Pistoor | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,586,477 | Dec. 24, 1996 | L.J. Stupica, D. Pistoor, D.A. Joseph, K.M. Babuder | Bar Stock Feeder Method and Apparatus Having Separable Guide Tube Sections | workpiece changers and storage mechanisms | |