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US Patent: 1,369,652
Line and Surface Level
Octagon Line & Surface Level
Patentee:
Frank Barr Hall - Geneva, OH

USPTO Classifications:
33/369

Tool Categories:
layout tools : levels : line levels

Assignees:
None

Manufacturer:
Frank B. Hall - Geneva, OH

Witnesses:
G. H. Cowdery
C. I. Brakeman

Patent Dates:
Applied: Jul. 22, 1920
Granted: Feb. 22, 1921

Patent Pictures: [ 1 | 2 ]
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Description:
Aluminum level designed with hangers to allow use as a line level and with a flat bottom surface to allow it to be used as a surface level. Known example weighed 1/2 oz was supplied in a tin box with a "rack" to secure it in the box as well as apparently to also use it as a base.

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