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| Patents for Robert Breuning | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,238,675 | Apr. 15, 1941 | R. Breuning | Adjustable Tool Holder | lathe tool holders and tool posts | |
| 3,067,636 | Dec. 11, 1962 | R. Breuning | Boring Head | boring heads | |