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| All Patents in class 475/217 | |||||
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| Number | Date | Patentee | Title | Type | |
| 587,714 | Aug. 10, 1897 | E.K. Dutton | Road Locomotive | steam road engines | |
| 655,133 | Jul. 31, 1900 | C.A. Tripp | Changeable Speed Gearing | industrial machine gearing | |
| 743,156 | Nov. 03, 1903 | F.O. Farwell | Variable Speed and Reversing Mechanism | metalworking variable speed mechanisms | |
| 2,512,008 | Jun. 20, 1950 | C.A. Bickel | Apparatus for Operating Lathes | metal lathe accessories and attachments | |