US Patent: 8,897
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| Improved Reflecting Spirit Level and Square
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Patentee:
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| Francis Wilbar (exact or similar names) - Roxbury, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 13, 1852 |
| Granted: |
Apr. 20, 1852 |
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Russ Allen.
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Description: |
| Combination of spirit levels and mirrors primarly designed for layout of walls. Wood or other suitable material is designated for use in the body. |
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