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| Patents for CROMNA COMPANY | |||||
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| Number | Date | Patentee | Title | Type | |
| DK-69,670 | Jul. 25, 1949 | O. Rønberg, H.F. Madsen | Skruenøgle ("wrench") | self-adjust wrenches | |
| 2,570,991 | Oct. 09, 1951 | M.F. Stellinger | Self-adjusting wrench for nuts or like polygonal objects | self-adjust wrenches | |