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| All Patents in class 192/78 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,253,787 | Jan. 15, 1918 | H.C. Clay | Clutch | industrial machine clutches | |
| 1,293,552 | Feb. 04, 1919 | A.M. Sosa, A.E. Robinson | Clutch | metalworking machine clutches | |
| 1,972,359 | Sep. 04, 1934 | C.F. Schenck | Feed mechanism for tool-carrying spindles | drill presses | |
| 2,258,270 | Oct. 07, 1941 | J. Velk | Driving mechanism | industrial machine pulleys and belt drive mechanisms | |