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US Patent: 3,061,935
Instrument for Determining Angles
Patentee: James T. De Witt (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 33/538 Tool Categories: metalworking machines : grinders : grinding attachments Assignees: Ex-Cell-O Corp. - Detroit, Wayne County, MI Manufacturer: Ex-Cell-O Corp. - Greenville, Darke County, OH Witnesses: Unknown	Patent Dates: Applied: Jun. 23, 1958 Granted: Nov. 06, 1962 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for EX-CELL-O Machine Tools, Inc.
Description: This patent was on a Sine-Magnetic Chuck manufactured by the Ex-Cell-O Corp.

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