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| Patents for Helfred John Rosenberg | |||||
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| Number | Date | Patentee | Title | Type | |
| 460,062 | Sep. 22, 1891 | H.J. Rosenberg | Revoluble Head Wrench | wrenches | |
| 506,261 | Oct. 10, 1893 | H.J. Rosenberg | Wrench | nut wrenches | |