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| All Patents in class 192/69.8 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,218,784 | Mar. 13, 1917 | W.F. Groene, R.K. Le Blond | Positive Apron Drive for Lathes | engine lathes | |
| 1,387,017 | Aug. 09, 1921 | H.C. Smith | Resilient Clutch | metalworking machine clutches | |
| 1,913,579 | Jun. 13, 1933 | A.T. Yates | Clutch | ||
| 2,016,806 | Oct. 08, 1935 | W.L. Schellenbach | Clutch | industrial machine clutches | |
| 2,822,072 | Feb. 04, 1958 | C.L. Goss | Device for engaging meshing driving and driven members | ||
| 4,060,007 | Nov. 29, 1977 | G.N. Levesque | Clutch Teeth | ||