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US Patent: 3,289,298
Calibration apparatus for surface plates
Patentee: Ray D. Standridge (exact or similar names) - Santa Fe Springs, CA USPTO Classifications: 33/1R, 33/286, 33/502, 356/256, 356/613 Tool Categories: metalworking tools : machinist tools : measuring tools Assignees: Collins Microflat Co., Inc. - Hawthorne, CA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 01, 1964 Granted: Dec. 06, 1966 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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