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CA Patent: CA-656,461
Control pump
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: Granted: Jan. 22, 1963 Patent Pictures: CIPO Data Report data errors or omissions to steward Jeff Joslin "Vintage Machinery" entry for Thompson Grinder Co.
Description: This patent has distinct similarities to patent {CA628,890}.

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