US Patent: 39,124
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| Plumb, Level, and Square
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Patentees:
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| John S. Davidson (exact or similar names) - Cranberry, NJ |
| Enoch Pullen (exact or similar names) - Prospect Plains, NJ |
| Derrick G. Davidson (exact or similar names) - Prospect Plains, NJ |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Jul. 07, 1863 |
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Ralph Brendler
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Description: |
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This is a fairly striaghtforward plumb, with a built-in square.
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