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US Patent: 3,193,977
Expandable Tool with Fluid Pressure Applicator
Patentee: Henry N. Martin (exact or similar names) - Cincinnati, Hamilton County, OH USPTO Classifications: 451/529 Tool Categories: metalworking machines : grinders : lapping machines : lapping tools Assignees: Cincinnati Milling Machine Co. - Cincinnati, Hamilton County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 31, 1963 Granted: Jul. 13, 1965 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cincinnati Milling Machine Co.

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