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US Patent: 2,153,463
Index Plate for Boring and Milling Machines
Patentee: Charles L. Grover (exact or similar names) - Philadelphia, PA USPTO Classifications: 116/233 Tool Categories: metalworking machines : metalworking machine mechanisms Assignees: William Sellers & Co., Inc. - Philadelphia, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 24, 1937 Granted: Apr. 04, 1939 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for William Sellers & Co.

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