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| Patents for John T. Williams | |||||
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| Number | Date | Patentee | Title | Type | |
| 652,441 | Jun. 26, 1900 | E.J. McClellan | Milling Machine Vice | milling machine accessories | |
| 655,157 | Jul. 31, 1900 | E.J. McClellan | Belt Tightener | metalworking machine mechanisms | |
| 800,470 | Sep. 26, 1905 | E.J. McClellan | Milling Machine | milling machines | |
| 922,880 | May 25, 1909 | E.J. McClellan, G.K. Garvin | Speed Change Gearing | metalworking speed changing mechanisms | |