US Patent: 449,609
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| Spirit-Level
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Patentee:
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| Henry Green (exact or similar names) - Hartford, CT |
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Patent Dates:
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| Applied: |
Aug. 05, 1890 |
| Granted: |
Mar. 31, 1891 |
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Ralph Brendler
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Description: |
| This is a small level designed to be attached to a ruler or drill bit. It features a built-in protractor to allow it to be used to measure specific angles.
Known examples are marked only with the patent date, but since the patent was assigned to John Tower, I assume that this piece was produced by Tower & Lyon. |
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