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| All Patents in class 192/224.1 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 153,534 | Jul. 28, 1874 | J.C. Butterfield | Improvement in trip-hammers | |
 | 355,146 | Dec. 28, 1886 | M. Deering | Power-hammer | |
 | 751,522 | Feb. 09, 1904 | A.A. Koch | Power Hammer | |