US Patent: D10,016
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| Design for Spirit Levels
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Patentee:
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| Leonard L. Davis (exact or similar names) - Springfield, MA |
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Patent Dates:
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| Applied: |
May 14, 1877 |
| Granted: |
May 29, 1877 |
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Russ Allen.
Vintage Machinery entry for Leonard L. Davis
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Description: |
| Classic Davis metal level. Four ornamental cross-bars or rungs are the key patented design. Three other patents D10014, D10015, and D10017, were also submitted on the same date by Davis. Interesting to note that instead of a drawing provided for the patent application, a photograph was submitted instead. Additionally, there are only 14 days between the application and the grant date. Length of the patent is for 7 years. |
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