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| Patents for Ralph R. Bollman | |||||
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| Picture | Number | Date | Patentee | Title | |
| 3,146,647 | Sep. 01, 1964 | R.R. Bollman | Automatic Copying Lathe | ||
| 3,158,920 | Dec. 01, 1964 | R.R. Bollman | Automatically Indexed Tool Turret | ||