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| All Patents in class 72/254 | |||||
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| Number | Date | Patentee | Title | Type | |
| 922,585 | May 25, 1909 | L.E. Hooker | Method of manufacturing cartridge-shells | cartridges | |
| 2,344,803 | Mar. 21, 1944 | W.W. Criley | Method of Forging Shovel Sockets and the Like | forging dies | |