US Patent: 511,377
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| Spirit-Level
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Patentee:
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| Justus A. Traut (exact or similar names) - New Britain, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 10, 1893 |
| Granted: |
Dec. 26, 1893 |
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Ralph Brendler
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Description: |
| This design features a sliding cover for the vial tube, and the ability to separate the tube from the base.
Stanley produced similar levels to this design (see Traut's 1896 patents 565,097 and 565,098), but none exactly like this one. |
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