US Patent: 17,023
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| Pendulum Level or Inclinometer
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Patentee:
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| Thomas A. Chandler (exact or similar names) - Rockford, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Apr. 14, 1857 |
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Ralph Brendler
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Description: |
| Thomas Chandler is back with an improvement to his earlier inclinometer patent (9,722 - 5/17/1854). The improvement in this patent is to engrave the entire perimeter of the disk, so that the level can be used from any angle.
From the 1886 book, "Federal Decisions, Vol. XXV. Patents, Copyright and Trade-marks": Held patentable, Chandler v. Ladd, 1 Mac A. Pat. Cases, 493.
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