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| All Patents in class 30/102 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,833,980 | Dec. 01, 1931 | W.O. Thewes | Pipe cutter | pipe cutters | |
| 1,977,441 | Oct. 16, 1934 | J.E. Kenerson | Self Feeding Tube Cutter | pipe cutters | |
| 2,126,951 | Aug. 16, 1938 | A.C. Dobrick | Tube cutter | tubing cutters | |
| 2,787,054 | Apr. 02, 1957 | G.E. Franck | Readily Adjustable Tube Cutting Means | tubing cutters | |