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US Patent: 75,827
Improvement in Calipers
Patentee: Jearum Atkins (exact or similar names) - Washington, DC USPTO Classifications: 33/558.01 Tool Categories: layout tools : calipers Assignees: None Manufacturer: Not known to have been produced Witnesses: Daniel D. Robinson David M. Van Narabst Frank Smith Wm. L. Seward	Patent Dates: Granted: Mar. 24, 1868 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This caliper joint design features a tapered shaft so that the calipers can be tightened in any position without the tightening moving the legs.

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