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| All Patents in class 475/315 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 161,986 | Apr. 13, 1875 | H.W. Sherrill | Reversing Pulley or Gear Wheel | ||
| 626,444 | Jun. 06, 1899 | H. Smith | Variable Speed Gearing | ||
| 1,171,003 | Feb. 08, 1916 | A.M. Sosa | Reversing Mechanism for Machine Tools | ||
| 3,448,828 | Jun. 10, 1969 | C.K. Goldberg | Drive speed control | ||