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US Patent: 11,420
Compass and Calipers
Patentee:
John E. Earle - 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 pdf tiff
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Description:
A simple caliper design featuring a screw-activated adjustment mechanism.

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