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| All Patents in class 474/2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 797,216 | Aug. 15, 1905 | J.J. Thacher, E.H. Parks | Grinding-Machine | ||
| 830,799 | Sep. 11, 1906 | G.W. Moreton | Driving Mechanism | metal planers | |
| 3,192,798 | Jul. 06, 1965 | W.E. Twamley | Spindle Transmission | ||