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US Patent: 343,342
Spring-calipers
Patentee: Cyrus S. Rogers (exact or similar names) - Springfield, MA USPTO Classifications: 24/504, 33/558.07 Tool Categories: layout tools : calipers Assignees: Christopher Berry - Springfield, MA Cyrus S. Rogers - Springfield, MA Manufacturer: Not known to have been produced Witnesses: Christopher Berry E. P. Bartholomew	Patent Dates: Applied: Mar. 15, 1886 Granted: Jun. 08, 1886 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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