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| All Patents in class 72/337 | |||||
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| Number | Date | Patentee | Title | Type | |
| 939,061 | Nov. 02, 1909 | A.L. Mowry | Machine for manufacturing grooved pins, &c. | ||
| 1,053,471 | Feb. 18, 1913 | J.R. Blakeslee | Forging Mechanism | forging apparatus and accessories | |
| 1,507,007 | Sep. 02, 1924 | F.H. Sleeper | Wire-forming machine | spring making machines | |
| 1,869,006 | Jul. 26, 1932 | W.W. Criley | Solid Die Header | forging apparatus and accessories | |
| 2,038,165 | Apr. 21, 1936 | W.W. Criley | Forging Machine | forging machines | |