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| All Patents in class 254/122 | |||||
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| Number | Date | Patentee | Title | Type | |
| 245,800 | Aug. 16, 1881 | J.A. Dunham, E.L. Dunham | Drag-sawing machines | drag saws | |
| 2,402,579 | Jun. 25, 1946 | W.A. Ross | Load lifter | ||
| 2,471,901 | May 31, 1949 | W.A. Ross | Load-lifting appliance | ||
| 2,928,558 | Mar. 15, 1960 | M.S. Prentice, C. Bamford | Machine for tilting and lifting a load | woodworking machine material handling | |