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US Patent: 28,104
Spirit Level
Patentee:
William T. Nicholson - Providence, RI

USPTO Classifications:
33/381

Tool Categories:
layout tools : levels : metallic levels

Assignees:
None

Manufacturer:
The Stanley Rule & Level Co. - New Britain, CT

Witnesses:
Wm. S. Hoyt
J. N. Moore

Patent Dates:
Applied: Mar. 16, 1860
Granted: May 01, 1860

Patent Pictures: [ 1 | 2 | 3 ]
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Description:
Protective cover for the spirit vial of a mechanic's level. Used on Stanley level models Nos. 13, 14, and 15. Known examples are marked with the patent date and Stanley Rule & Level Co.

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