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| Patents for Steel Art Tool Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,158,832 | Nov. 02, 1915 | C.A. Palmgren | Dog | lathe dogs | |
| 1,425,213 | Aug. 08, 1922 | C.A. Palmgren | Drill chuck | drill chucks | |