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| Patents for Mason P. Pritchard | |||||
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| Picture | Number | Date | Patentee | Title | |
| 772,894 | Oct. 18, 1904 | W.F. Groene, R.K. Blond | Means for mounting worm-gearing in milling-machines | ||
| 789,860 | May 16, 1905 | W.F. Groene, R.K. Blond | Milling-machine | ||
| 956,643 | May 03, 1910 | W.F. Groene, R.K. Blond | Milling-machine | ||