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| All Patents in class 192/74 | |||||
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| Number | Date | Patentee | Title | Type | |
| 58,765 | Oct. 16, 1866 | G.W. Bishop | Improvement in friction-clutch pulleys | industrial machine pulleys and belt drive mechanisms | |
| 80,045 | Jul. 14, 1868 | C. Wright | Improvement in friction-clutch pulley | industrial machine clutches | |
| 627,316 | Jun. 20, 1899 | E. Moreau, A. Allen | Clutch | industrial machine clutches | |
| 706,665 | Aug. 12, 1902 | W.T. Johnson | Engine Lathe | metal lathes | |