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| All Patents in class 474/80 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,022,756 | Apr. 09, 1912 | C.D. Rice | Belt-gearing | drill presses | |
| 1,259,343 | Mar. 12, 1918 | W.J. Bayrer | Belt-gearing | drill presses | |