US Patent: 28,104 - Spirit Level


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US Patent: 28,104

Spirit Level

Patentee:

William T. Nicholson (exact or similar names) - 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.