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US Patent: 797,409
Calipers
Patentee:
Frank M. Davis (exact or similar names) - Milwaukee, WI

USPTO Classifications:
33/821

Tool Categories:
layout tools : measurement gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
C. H. Keeney
Anna F. Schmidtbauer
C. T. Benedict
Patent Dates:
Applied: Dec. 16, 1904
Granted: Aug. 15, 1905

Patent Pictures:
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