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US Patent: 1,941,918
Valve Grinding Machine
Patentee: Emil F. Schwakopf (exact or similar names) - Brooklyn, Kings County, NY USPTO Classifications: 99/543, 99/599 Tool Categories: specialty machines : valve reseating machines trade specific : vehicle repairer : vehicle mechanic : valve and seat maintenance Assignees: Hall Manufacturing Co. - Toledo, Lucas County, OH Manufacturer: Hall Manufacturing Co. - Toledo, Lucas County, OH Witnesses: Unknown	Patent Dates: Applied: May 22, 1931 Granted: Jan. 02, 1934 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Hall Manufacturing Co.

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