US Patent: 431,184
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Plumb-Level
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Patentee:
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Reuben Einstein (exact or similar names) - Meadville, PA |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Apr. 05, 1890 |
Granted: |
Jul. 01, 1890 |
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Ralph Brendler
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Description: |
This inclinometer features several elements designed to make it more rugged and less susceptible to going out of alignment when dropped. |
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