US Patent: 423,090
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Combined Square, Plumb, and Level
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Patentee:
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Frederick F. Smith (exact or similar names) - Vandalia, IL |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Aug. 06, 1889 |
Granted: |
Mar. 11, 1890 |
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Ralph Brendler
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Description: |
This is basically a framing square with a swinging pendulum arm attached to it, allowing it to be used as a basic level or inclinometer. |
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