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| Patents for George W. Marshall | |||||
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| Picture | Number | Date | Patentee | Title | |
| 416,479 | Dec. 03, 1889 | G.W. Marshall | Combined Key Seat and Key Cutting Machine | ||
| 3,089,293 | May 14, 1963 | M.V. Waters, G.W. Marshall, W.A. Hoier | Automatic Control Mechanism for Roll Grinder | ||