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| All Patents in class 475/159 | |||||
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| Number | Date | Patentee | Title | Type | |
| 252,537 | Jan. 17, 1882 | J. Stewart | Speed Gearing | industrial machine speed and direction changing mechanisms | |
| 1,385,283 | Jul. 19, 1921 | E.B. Smith, A.H. Loucks | Lubricator | industrial machine clutches | |
| 2,141,209 | Dec. 27, 1938 | G.W. Emrick | Tapping attachment | tapping heads and chucks | |
| 2,544,061 | Mar. 13, 1951 | E.T. Barnett | Speed change driving head for power-driven machine | drill presses | |