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US Patent: 11,420
Compass and Calipers
Patentee: John E. Earle (exact or similar names) - Leicester, MA USPTO Classifications: 33/558.07 Tool Categories: layout tools : calipers layout tools : compasses Assignees: None Manufacturer: Not known to have been produced Witnesses: H. D. Stone George F. Verry	Patent Dates: Granted: Aug. 01, 1854 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: A simple caliper design featuring a screw-activated adjustment mechanism.

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