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| All Patents in class 475/81 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,074,295 | Jan. 22, 1963 | E.P. Bullard, III | Transmission | ||
| 3,203,276 | Aug. 31, 1965 | E.P. Bullard | Variable Speed Transmission | metalworking machine mechanisms | |