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US Patent: 2,618,244
Pilot Valve Controlled Tracer Valve
Patentee: Erwin G. Roehm (exact or similar names) - Norwood, Hamilton County, OH USPTO Classifications: 137/625.6, 137/625.63, 241/3, 251/3, 251/31, 409/129, 91/376R, 91/417R, 91/445 Tool Categories: metalworking machines : metalworking machine mechanisms : hydraulic apparatus Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 12, 1947 Granted: Nov. 18, 1952 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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