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US Patent: 2,351,773
Device for Determining Angles
Patentee: Hans J. Lovenston (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 269/71, 269/79, 269/84, 33/537, 33/538, 409/219 Tool Categories: metalworking machines : grinders : grinding attachments Assignees: None Manufacturer: Ex-Cell-O Corp. - Greenville, Darke County, OH Witnesses: Unknown	Patent Dates: Applied: May 29, 1941 Granted: Jun. 20, 1944 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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