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| All Patents in class 403/55 | |||||
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| Number | Date | Patentee | Title | Type | |
| 264,859 | Sep. 26, 1882 | J.C. Butterfield | Atmospheric hammer | drop hammers | |
| 5,118,058 | Jun. 02, 1992 | G.L. Richter | Universal adjustable mount | vises | |