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US Patent: 2,612,184
Sensitive Hydraulic Tracer Valve
Patentee: Wendell I. Evans (exact or similar names) - Cincinnati, Hamilton County, OH USPTO Classifications: 137/628, 251/3, 409/129, 91/31, 91/37 Tool Categories: metalworking machines : metalworking machine mechanisms : hydraulic apparatus Assignees: Cincinnati Milling Machine Co. - Cincinnati, Hamilton County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 14, 1949 Granted: Sep. 30, 1952 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cincinnati Milling Machine Co.

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