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US Patent: 1,299,838
Indicator
Patentee:
Clarence J. Keller (exact or similar names) - Columbus, OH

USPTO Classifications:
116/291, 33/603, 451/8

Tool Categories:
layout tools : measurement gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
George D. Barok
Horatio S. Atehum
Patent Dates:
Applied: Mar. 19, 1918
Granted: Apr. 08, 1919

Patent Pictures:
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