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| All Patents of Type: metal forming | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,196,497 | Apr. 09, 1940 | H.D. Heman | Method of Forming Tubular Members Having Thick Walled End Portions | metal forming | |
| 2,344,803 | Mar. 21, 1944 | W.W. Criley | Method of Forging Shovel Sockets and the Like | forging dies | |
| 2,626,453 | Jan. 27, 1953 | W.W. Criley | Method of Making Forged Blanks and Forgings | metal forming | |