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| All Patents in class 72/71 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 419,292 | Jan. 14, 1890 | G.F. Simons | Method of Making Irregular Shaped Metal Articles | ||
 | 816,570 | Apr. 03, 1906 | J.D. Edmonds | Tool For Straightening Bolts and Retracing the Threads Thereon | |
| 2,251,810 | Aug. 05, 1941 | H.C. Smith, Jr. | Forming and Trimming Machine | ||