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US Patent: 2,851,831
Hydraulic work-supporting clamp assembly
Patentee: Francis P. Healy (exact or similar names) - Springfield, MA USPTO Classifications: 279/4.12, 451/365 Tool Categories: trade specific : vehicle repairer : vehicle mechanic : engine block and head maintenance Assignees: Van Norman Industries, Inc. - Springfield, MA Manufacturer: Van Norman Industries, Inc. - Springfield, MA Witnesses: Unknown	Patent Dates: Applied: Feb. 08, 1957 Granted: Sep. 16, 1958 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Van Norman Machine Tool Co.
Description: The suggested application for this work holder is in re-machining an engine head.

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