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| All Patents in class 74/617 | |||||
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| Number | Date | Patentee | Title | Type | |
| 521,055 | Jun. 05, 1894 | C.W. Shartle | Slip-collar for pulleys, shafts, &c. | industrial machine pulleys and belt drive mechanisms | |
| 846,088 | Mar. 05, 1907 | C.E. Brinley | Shaft-collar | industrial machine pulleys and belt drive mechanisms | |