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| Patents for Wm. O. Carlson | |||||
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| Number | Date | Patentee | Title | Type | |
| 631,801 | Aug. 29, 1899 | C. Bongfeldt, R.L. Levin | Wrench. | spoke nipple wrenches | |
| 634,175 | Oct. 03, 1899 | R.L. Levin | Wrench | spoke nipple wrenches | |