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US Patent: 2,836,424
Automatic Centering Tool Holder Mechanism
Patentee: Joseph L. Guildi (exact or similar names) - Somerville, Middlesex County, MA USPTO Classifications: 279/16, 464/49 Tool Categories: metalworking machines : drilling and boring : drilling and boring tool holders Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 04, 1955 Granted: May 27, 1958 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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