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| All Patents in class 72/440 | |||||
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| Number | Date | Patentee | Title | Type | |
| 497,013 | May 09, 1893 | C.M. Brown | Power-hammer | drop hammers | |
| 518,353 | Apr. 17, 1894 | G.W. Peck | Drop Press | drop hammers | |
| 588,422 | Aug. 17, 1897 | C. Grüber | Mechanical or Drop Hammer | drop hammers | |
| 632,265 | Sep. 05, 1899 | J. Horton | Drop Hammer | drop hammers | |
| 2,688,265 | Sep. 07, 1954 | C. Priesmeyer | Safety stop device for drop hammers or the like | drop hammers | |