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US Patent: 267,290
Calipers
Patentee:
Oliver D. Warfield (exact or similar names) - Springfield, MA

USPTO Classifications:
33/558.07

Tool Categories:
layout tools : calipers

Assignees:
Oliver P. Warfield - Springfield, MA
Frank J. Warner - Springfield, MA

Manufacturer:
Not known to have been produced

Witnesses:
T. A. Curtis
Chas. H. Wood
N. E. Dwinnell

Patent Dates:
Applied: Jul. 21, 1882
Granted: Nov. 07, 1882

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Ralph Brendler
Description:
This caliper design focuses on making the tool usable one-handed.

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