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| All Patents in class 192/85.63 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,938,780 | Dec. 12, 1933 | B. Sassen, L.F. Nenninger | Power Operated Clutch for Machine Tools | metalworking power transmission | |
| 2,465,942 | Mar. 29, 1949 | V.v. Sundt | Headstock control mechanism for machine tools | metal lathes | |
| 2,538,997 | Jan. 23, 1951 | J.N. Weiland | Fluid clutch with pressure booster | metalworking power transmission | |
| 2,734,609 | Feb. 14, 1956 | R.C. Fritzsch | Pneumatic clutch control | sheet metal brakes | |