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US Patent: 1,000,512
Leveling Instrument
Line Level
Patentee:
Irving L. Griswold - Chicago, IL

USPTO Classifications:
33/369

Tool Categories:
layout tools : levels : line levels

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Alexander Lloyd
Berthel Sloy
G. M. Spring
Fredericka D. Owen

Patent Dates:
Applied: Dec. 23, 1910
Granted: Aug. 15, 1911

Patent Pictures:
USPTO pdf tiff
Google Patents
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Description:
This line level is designed to improve accuracy by its being light-weight and spanning a longer section of line.

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