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US Patent: 441,812
Surface-Gage
Patentee: Emory Upton (exact or similar names) - Battle Creek, MI USPTO Classifications: 33/32.2 Tool Categories: layout tools : measurement gauges : surface gauges Assignees: None Manufacturer: Not known to have been produced Witnesses: Albert C. Kingman A. A. Ellsworth Wm. F. Blodgett L. E. Strum	Patent Dates: Applied: Apr. 05, 1890 Granted: Dec. 02, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This gage uses something very like a pair of adjustable calipers to adjust the arm.

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