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| Patents for Tadeusz Wiktor Piotrowski | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,964,616 | Jun. 22, 1976 | T.W. Piotrowski | Machine Tool Interchange Arm | tool changers and storage mechanisms | |
| 3,987,909 | Oct. 26, 1976 | T.W. Piotrowski | Tool Storage Mechanism | tool changers and storage mechanisms | |