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| Patents for William R. Biddle | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,034,723 | Aug. 06, 1912 | A.C. Schuerrmann, H. Mueller | Tool-retaining device for boring-bars | boring bars | |
| 1,034,724 | Aug. 06, 1912 | H. Mueller | Tool-shank | boring bars | |