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| All Patents in class 192/3.61 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,099,520 | Jun. 09, 1914 | D.T. Brownlee, F.W. Spacke, W. Spacke | Change-Speed Gearing | speed gearing and transmissions | |
| 2,466,574 | Apr. 05, 1949 | E.P. Bullard, E.N. Cowell | Transmission | ||
| 2,555,242 | May 29, 1951 | F.A. Hassman, E.D. Vancil, L.F. Nenninger | Milling Machine Transmission and Control Mechanism | milling machines | |