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| All Patents in class 74/331 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 695,665 | Mar. 18, 1902 | H.B. Binsse | Feed Mechanism for Machine Tools | ||
 | 1,415,515 | May 09, 1922 | C. Bouillon | Change Gear Mechanism | |
 | 1,543,678 | Jun. 30, 1925 | L.G. Merritt | Power Transmission for Veneer Lathes | |
| 2,167,748 | Aug. 01, 1939 | S.C. Gebert | Variable Speed Gear Transmission | ||
| 3,192,798 | Jul. 06, 1965 | W.E. Twamley | Spindle Transmission | ||