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US Patent: 970,729
Spirit Level
Patentee:
George W. Lingle (exact or similar names) - Burlington, WI

USPTO Classifications:
33/383

Tool Categories:
layout tools : levels

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
S. Elra Kellogg
Walter Wagner
Patent Dates:
Applied: Nov. 10, 1909
Granted: Sep. 20, 1910

Patent Pictures:
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