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US Patent: 496,679
Beam Calipers
Patentee: Alfred Barker (exact or similar names) - Richfield Springs, NY USPTO Classifications: 33/806 Tool Categories: layout tools : measurement gauges Assignees: None Manufacturer: Unknown Witnesses: John C. Kehrer C. L. House	Patent Dates: Applied: Jan. 09, 1893 Granted: May 02, 1893 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens
Description: This caliper was advertised in the 07 Jul 1894 issue of Scientific American, page 16.

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