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| All Patents in class 72/341 | |||||
| Number | Date | Patentee | Title | Type | |
| 1,771,709 | Jul. 29, 1930 | E.F. Gibbs | Method of Forming Turning Tool Holders | lathe tool holders and tool posts | |
| 2,572,492 | Oct. 23, 1951 | K.F. Kempf | Method of Making Adjustable Jaw Wrenches | screw adjust wrenches | |
| 2,854,866 | Oct. 07, 1958 | R.G. Sholeen, A.W. Mall | Method of forming saw chain teeth and saw chain cutter links | tool making | |