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| Patents for Ernst A. Bostrom | |||||
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| Number | Date | Patentee | Title | Type | |
| 280,713 | Jul. 03, 1883 | E.A. Bostrom | Leveling Instrument | ||
| 314,511 | Mar. 24, 1885 | E.A. Bostrom | Leveling Instrument | surveying apparatus | |