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US Patent: 991,630
Yielding Tapping Attachment
Patentee: Frank P. Miller (exact or similar names) - Meadville, Crawford County, PA USPTO Classifications: 279/53, 408/140, 464/42, 470/103 Tool Categories: metalworking machines : drilling and boring : tapping heads and chucks Assignees: McCrosky Tool Corp. - Meadville, Crawford County, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 11, 1910 Granted: May 09, 1911 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for McCrosky Tool Corp.

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