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US Patent: 2,638,804
Actuating means for advancing and locking jaws of vises and like fixtures
Patentee: Robert O. Heinrich (exact or similar names) - Racine, WI USPTO Classifications: 269/168, 269/196, 74/526 Tool Categories: work holding : vises : machinist vises Assignees: None Manufacturer: Heinrich Tools Inc. - Racine, WI Witnesses: Unknown	Patent Dates: Applied: Aug. 10, 1951 Granted: May 19, 1953 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Heinrich Co.
Description: Improvements to patent 2,424,313.

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