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| Patents for Millen Manufacturing Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,699,306 | Jan. 15, 1929 | E.L. Millen | Gripping Screwdriver | screwdriver blades | |
| 2,472,673 | Jun. 07, 1949 | E.L. Millen | Screw holding screwdriver | screwdriver blades | |