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| Patents for Theodore F. Vandergrift | |||||
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| Picture | Number | Date | Patentee | Title | |
| 512,850 | Jan. 16, 1894 | T.F. Vandergrift | Belt Tightener and Shifter | ||
| 655,136 | Jul. 31, 1900 | T.F. Vandergrift | Shaft Coupling | ||