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| Patents for Willard A. Roraback | |||||
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| Number | Date | Patentee | Title | Type | |
| 519,924 | May 15, 1894 | W.P. Norton | Screw Cutting Engine Lathe | screwcutting lathes | |
| 528,381 | Oct. 30, 1894 | W.P. Norton | Drilling Machine | horizontal boring mills | |