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US Patent: D10,017
Design for Spirit Levels
Patentee:
Leonard L. Davis - Springfield, MA

USPTO Classifications:
D10/69

Tool Categories:
layout tools : levels : machinist levels

Assignees:
None

Manufacturer:
Davis Level & Tool Co. - Springfield, MA

Witnesses:
Willmore B. Stone
J. P. Buckland

Patent Dates:
Applied: May 15, 1877
Granted: May 29, 1877

Patent Pictures:
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Description:
Classic Davis metal machinist type level. The ornamental base plate and short columns make up the design patent. Three other patents D10014, D10015, and D10016, 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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