US Patent: 431,568
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| Measuring-Scale
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Patentee:
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| Hermann Esser (exact or similar names) - Hoboken, NJ |
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Patent Dates:
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| Applied: |
Sep. 25, 1889 |
| Granted: |
Jul. 08, 1890 |
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Ralph Brendler
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Description: |
| This patent covers a new way of manufacturing triangular engineer's scales. Instead of etching the graduations on the scale itself, the graduations are made in a thin piece of plastic and glued to the scale body.
This technique was widely copied, but the only scales known to be marked with this patent were from K&E. |
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