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US Patent: 68,961
Improvement in Adjustable Spirit Levels
Patentee:
Leonard L. Davis - Springfield, MA

USPTO Classifications:
33/375, 33/388

Tool Categories:
layout tools : levels : metallic levels

Assignees:
None

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

Witnesses:
F. S. Bacon
Geo. B. Pierce

Patent Dates:
Granted: Sep. 17, 1867

Patent Pictures: [ 1 | 2 | 3 | 4 | 5 ]
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Description:
Known example (pic 3) by Davis Level & Tool Co.

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