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US Patent: 600,049
Calipers
Patentee:
Fred A. Thompson (exact or similar names) - Eureka, WI

USPTO Classifications:
33/412

Tool Categories:
layout tools : calipers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Otto Spieth
H. Hooster
Lizzie Thompson
Peter Jensan
Patent Dates:
Applied: Aug. 11, 1897
Granted: Mar. 01, 1898

Patent Pictures:
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