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| All Patents in class 474/73 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,346,731 | Apr. 18, 1944 | J.G. Collins | Drill press | drill presses | |
| 2,566,579 | Sep. 04, 1951 | F.L. Nichols | Multiple-speed drill press | drill presses | |
| 5,690,567 | Nov. 25, 1997 | M. Lindner, J.F. DeNijs | Transmission for Converting Rotary Motion into Linear Motion | ||