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| All Patents in class 475/325 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 797,001 | Aug. 15, 1905 | F.H. Heitger | Speed-Changing Gear | |
| 800,268 | Sep. 26, 1905 | C.M. Conradson | Speed Changing Mechanism | ||
 | 812,533 | Feb. 13, 1906 | H.A. Tuttle | Reversing-gear | |
| 1,178,284 | Apr. 04, 1916 | A. Winton | Transmission Mechanism | ||
 | 1,680,141 | Aug. 07, 1928 | W.T. Emmes | Reversing and braking mechanism for machine tools | |
 | 2,856,797 | Oct. 21, 1958 | C.F. Dassance | Variable speed geared pulley | |