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US Patent: 1,275,218
Machine for Grinding Worm Threads
Patentee: Charles H. Calkins (exact or similar names) - Ludlow, MA USPTO Classifications: 451/222, 451/294, 451/363 Tool Categories: Assignees: Baush Machine Tool Co. - Springfield, MA Manufacturer: Not known to have been produced Witnesses: René Bruine	Patent Dates: Applied: Mar. 17, 1916 Granted: Aug. 13, 1918 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Baush Machine Tool Co.
Description: D. Anthony Usina - patent attorney

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