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| All Patents in class 192/70.2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,192,793 | Jul. 25, 1916 | H. Manthey | Clutch | harvesters | |
| 1,665,554 | Apr. 10, 1928 | G.F. Kolb | Clutch | ||
| 1,903,963 | Apr. 18, 1933 | G.W. Emrick | Multiple disk clutch | tapping machines | |