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US Patent: 486,810
Automatic Indicating Calipers
Patentee: John W. Porter (exact or similar names) - Waukesha, Waukesha County, WI USPTO Classifications: 33/651 Tool Categories: metalworking tools : machinist tools : measuring tools : indicating calipers Assignees: Jame McNaughton - Waukesha, Waukesha County, WI Manufacturer: Not known to have been produced Witnesses: C. E. Armin Abbie M. Peabody	Patent Dates: Applied: Aug. 15, 1892 Granted: Nov. 22, 1892 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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