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US Patent: 2,985,109
Hydraulic Pump
Patentee: Walter Ernst (exact or similar names) - Dayton, Montgomery County, OH USPTO Classifications: 417/213, 417/220, 418/26 Tool Categories: metalworking machines : metalworking machine mechanisms : hydraulic apparatus Assignees: Thompson Grinder Co. - Springfield, Clark County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 02, 1955 Granted: May 23, 1961 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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