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| All Patents in class 74/445 | |||||
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| Number | Date | Patentee | Title | Type | |
| 7,609X | Jun. 29, 1833 | S.G. Allen | Horse power (Sawyer) | ||
| 379,198 | Mar. 06, 1888 | W.R. Fee | Wooden Split Pulley | industrial machine pulleys and belt drive mechanisms | |