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| All Patents in class 192/3.57 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,313,438 | Mar. 09, 1943 | W.G. Hoelscher | Fluid Operated Gear Shifting Mechanism | ||
| 2,349,595 | May 23, 1944 | M.E. Martellotti | Machine Tool Control Mechanism | ||
| 2,519,794 | Aug. 22, 1950 | H.C. Kemper, H.J. Siekmann | Hydraulic Gear Shifting Mechanism | ||
| 3,386,543 | Jun. 04, 1968 | J.G. Osburn | Machine Tool Transmission and Control Mechanism | ||