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| All Patents in class 476/52 | |||||
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| Number | Date | Patentee | Title | Type | |
| 390,216 | Oct. 02, 1888 | G.F. Evans | Speed Regulating Device | industrial machine pulleys and belt drive mechanisms | |
| 627,491 | Jun. 27, 1899 | G.F. Evans | Belt Shifting Device | industrial machine pulleys and belt drive mechanisms | |