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| Patents for Carl U. Johanson | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,897,035 | Feb. 14, 1933 | C.J. Anderson | Grinding machine | sharpening machines | |
| 1,918,951 | Jul. 18, 1933 | C.J. Anderson | Grinding machine | sharpening machines | |