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US Patent: 664,995
Screw Thread Gage
Patentee: Gustav Ernst (exact or similar names) - Jena, Saxe-Weimar, Germany USPTO Classifications: 315/283, 33/199R, 33/555.4 Tool Categories: metalworking tools : machinist tools : measuring tools : thread gages Assignees: Carl Zeiss - Jena, Saxe-Weimar, Germany Manufacturer: Not known to have been produced Witnesses: Emil Dornitz Peter Kruger Rudolf Fricke B. H. Warner, Jr.	Patent Dates: Applied: Feb. 15, 1899 Granted: Jan. 01, 1901 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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