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| All Patents in class 475/299 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 594,195 | Nov. 23, 1897 | A.G. Cooke | Variable and Reversing Speed Gear | ||
 | 765,346 | Jul. 19, 1904 | C.F. Smith | Reversing mechanism | |
| 2,848,908 | Aug. 26, 1958 | J.C. Hollis | Planetary Speed Change Transmission | ||