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US Patent: 3,047,987
Apparatus for Submerged Grinding
Patentees: William G. Baldenhofer (exact or similar names) - Springfield, Clark County, OH Frederick G. Krafft (exact or similar names) - Springfield, Clark County, OH USPTO Classifications: 451/213, 451/450 Tool Categories: metalworking machines : metalworking machine mechanisms Assignees: Thompson Grinder Co. - Springfield, Clark County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 23, 1961 Granted: Aug. 07, 1962 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Thompson Grinder Co.

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