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| All Patents in class 72/57 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 32,102 | Apr. 16, 1861 | J. Dodge | Hardening saw-plates | |
 | 174,609 | Mar. 07, 1876 | R. Wright | Improvement in Machines for Bending Tubing | |
| 2,344,743 | Mar. 21, 1944 | H.C. Smith, Jr. | Forming Method and Apparatus | ||
| 2,766,711 | Oct. 16, 1956 | K.P. Martin, L.A. Dever | Press | ||
| 2,878,767 | Mar. 24, 1959 | R.A. Paulton | Forming Press Diaphragm | ||
| 2,937,606 | May 24, 1960 | R.A. Paulton | Metal Forming Press | ||
| 3,115,858 | Dec. 31, 1963 | C.L. Mitchell | Hydraulic Press | ||