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| Patents for Oscar C. Hedin | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,226,226 | Dec. 24, 1940 | O.C. Hedin | Removable pilot for counterbore or reamer | |
 | 2,397,109 | Mar. 26, 1946 | O.C. Hedin | Device for precision drawing | |