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| All Patents in class 29/DIG.61 | |||||
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| Number | Date | Patentee | Title | Type | |
| 787,339 | Apr. 11, 1905 | R.F. Massa | Attachment for Drop Hammers | drop hammers | |
| 2,434,750 | Jan. 20, 1948 | F.D. Boehmer, K.A. Riedel, O.W. Barker, J.B. Armitage, T. Trecker | Machine Tool | milling machines | |