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| All Patents in class 72/375 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 184,158 | Nov. 07, 1876 | H.W. Kip | Method of Making Hammers | |
| 2,066,372 | Jan. 05, 1937 | J.J. Tomalis | Method of Making Dies or Punches | ||
| 2,163,715 | Jun. 27, 1939 | F.P. Stull | Method of and Tool for Shaping and Ironing Sheet Metal | ||
 | 2,744,315 | May 08, 1956 | R.P. Fitzgerald | Method and apparatus for die-forging articles from blanks of normally rigid material | |