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US Patent: 2,464,626
Pilot Operated Servo Valve
Patentee: Arthur P. Waterson (exact or similar names) - Tulsa, OK USPTO Classifications: 82/11.5, 82/133, 91/37, 91/376R, 91/445, 91/461 Tool Categories: metalworking machines : metalworking machine mechanisms metalworking machines : metal lathes Assignees: R. K. Le Blond Machine Tool Co. - Cincinnati, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 22, 1947 Granted: Mar. 15, 1949 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for R. K. Leblond Machine Tool Co.

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