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| All Patents in class 72/361 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,368,069 | Jan. 23, 1945 | A.P. Stone, C.E. Poole | Procedure and Equipment for Forging or Forming Articles | ||
| 2,742,802 | Apr. 24, 1956 | E.C. Clarke, H.A. Weyer | Impact device | drop hammers | |