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US Patent: 2,570,647
Power Cylinder and Piston With Leakage Control
Patentee: Gerard A. Cormier (exact or similar names) - Springfield, Windsor County, VT USPTO Classifications: 277/449, 277/907, 91/444, 91/451, 91/467, 92/82 Tool Categories: metalworking machines : metalworking machine mechanisms : hydraulic apparatus Assignees: Jones & Lamson Machine Co. - Springfield, Windsor County, VT Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 08, 1947 Granted: Oct. 09, 1951 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Jones, Lamson & Co.

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