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| All Patents in class 475/326 | |||||
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| Number | Date | Patentee | Title | Type | |
| 161,986 | Apr. 13, 1875 | H.W. Sherrill | Reversing Pulley or Gear Wheel | industrial machine pulleys and belt drive mechanisms | |
| 626,884 | Jun. 13, 1899 | H.B. Binsse | Gearing | metalworking machine gearing | |
| 797,001 | Aug. 15, 1905 | F.H. Heitger | Speed-Changing Gear | industrial machine speed and direction changing mechanisms | |
| 2,856,797 | Oct. 21, 1958 | C.F. Dassance | Variable speed geared pulley | industrial machine gearing | |