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| All Patents in class 72/481.6 | |||||
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| Number | Date | Patentee | Title | Type | |
| 385,540 | Jul. 03, 1888 | H.J. Bierhart | Power Hammer | drop hammers | |
| 1,404,126 | Jan. 17, 1922 | W.P. Krause | Riveter | riveting machines | |
| 1,485,486 | Mar. 04, 1924 | J.I. Depew | Power Hammer | drop hammers | |