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US Patent: 2,621,556
Comparator for Testing Turbine Blades and the Like
Patentees: Robert O. Beardsley (exact or similar names) - Springfield, Windsor County, VT James A. Allan (exact or similar names) - Springfield, Windsor County, VT USPTO Classifications: 33/547, 356/392 Tool Categories: metalworking tools : machinist tools : measuring tools : comparators Assignees: Jones & Lamson Machine Co. - Springfield, Windsor County, VT Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 28, 1949 Granted: Dec. 16, 1952 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Jones, Lamson & Co.

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