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| Patents for Frank H. Petersen | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,435,873 | Nov. 14, 1922 | F.H. Petersen | Tool Holder | drilling and boring tool holders | |
| 1,442,234 | Jan. 16, 1923 | F.H. Petersen | Tool Holder | drilling and boring tool holders | |