US Patent: 1,219,430
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| Instrument for Use in Topography
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Patentee:
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| Alfred W. Bjornstad (exact or similar names) - Fort Leavenworth, KS |
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Patent Dates:
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| Applied: |
Apr. 13, 1916 |
| Granted: |
Mar. 20, 1917 |
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Patent Pictures:
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Russ Allen.
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Description: |
| Designed to provide a direct reading of the true slope or angle of the actual ground which the relief map represents when the the vertical and horizontal scales are different from each other.
Known example marked: PAT MCH.20.1917/GRADUATED FOR/B-H RELIEF MAP |
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