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| All Patents in class 82/86 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,438,991 | Dec. 19, 1922 | W.R. Fox, H.D. Corwin | Pipe cutter | ||
| 2,109,786 | Mar. 01, 1938 | D. Taft | Method of and Apparatus for Operating a Cutting Tool | metal sawing machines | |