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| All Patents in class 29/DIG.51 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,006,529 | Oct. 24, 1911 | R.S. Brown | Journal Box | polishing machines | |
| 2,162,038 | Jun. 13, 1939 | W. Trible | Grinding Machine | grinding machines | |
| 2,434,750 | Jan. 20, 1948 | F.D. Boehmer, K.A. Riedel, O.W. Barker, J.B. Armitage, T. Trecker | Machine Tool | milling machines | |