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GB Patent: GB-850,425
A hydraulic circuit embodying a combined pump and control unit
Patentees: Walter Ernst (exact or similar names) - Dayton, OH Frederick G. Krafft (exact or similar names) - Springfield, OH USPTO Classifications: Tool Categories: metalworking machines : grinding machines metalworking machines : metalworking machine mechanisms : hydraulic apparatus Assignees: Thompson Grinder Co. - Dayton, OH Manufacturer: Thompson Grinder Co. - Springfield, OH Witnesses: Unknown	Patent Dates: Applied: Aug. 18, 1958 Granted: Oct. 05, 1960 Patent Pictures: Espacenet patent Report data errors or omissions to steward Jeff Joslin "Vintage Machinery" entry for Thompson Grinder Co.

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