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| All Patents in class 74/29 | |||||
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| Number | Date | Patentee | Title | Type | |
| 24,913 | Jul. 26, 1859 | S.R. Smith, P.P. Lane | Portable sawing-machine | circular sawmills | |
| 65,981 | Jun. 18, 1867 | A.B. Wood | Mechanical Power | industrial machine speed and direction changing mechanisms | |
| 1,598,091 | Aug. 31, 1926 | J. Larocca | Impacting tool | impact chisels and drills | |
| 2,453,656 | Nov. 09, 1948 | E.P. Bullard | Rack and Pinion Gear Means | ||
| 3,786,938 | Jan. 22, 1974 | E.E. Kirkham | Reversing Drive for a Tool Changer | tool changers and storage mechanisms | |