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US Patent: 288,771
Calipers
Patentee: Reuben H. Brown (exact or similar names) - New Haven, CT USPTO Classifications: 33/558.07 Tool Categories: layout tools : calipers Assignees: None Manufacturer: Not known to have been produced Witnesses: A. C. Depew John N. Austin A. Ruppert W. J. Cole	Patent Dates: Applied: May 03, 1883 Granted: Nov. 20, 1883 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens
Description: This design attaches a micrometer-style shaft to a standard set of calipers to allow direct measurements to be taken very accurately.

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