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US Patent: 297,574
Spirit Level
Patentee:
Leonard L. Davis (exact or similar names) - Springfield, MA

USPTO Classifications:
33/385

Tool Categories:
layout tools : levels : metallic levels

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Wm. H. Chapin
J. D. Garfield

Patent Dates:
Applied: Mar. 10, 1884
Granted: Apr. 29, 1884

Patent Pictures:
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Report data errors or omissions to steward Russ Allen.
Description:
Four screws are used to hold and when necessary adjust the level spirit vial.

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