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| Patents for Sibley Machine & Foundry Corp. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,619,842 | Dec. 02, 1952 | P.C. Felix | Variable-speed drive for machine tools | |
| 3,400,751 | Sep. 10, 1968 | D.A. Behnke | Method of treating cores | ||