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US Patent: 3,011,449
Vaned Hydraulic Unit
Patentee: Walter Ernst (exact or similar names) - Dayton, Montgomery County, OH USPTO Classifications: 418/173, 418/269, 418/71, 418/79 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: Apr. 15, 1960 Granted: Dec. 05, 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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