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| Patents for Rockford Tool Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,338,757 | May 04, 1920 | G.D. Sundstrand | Relieving attachment for lathes | |
| 1,491,523 | Apr. 22, 1924 | G.H. Ekstrom | Adjustable drilling and balancing tool | ||
| 1,598,172 | Aug. 31, 1926 | G.D. Sundstrand | Lathe | ||