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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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