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US Patent: 255,080
Lathe chuck for turning polygonal bodies
Patentee: Henry Clay Humphrey (exact or similar names) - New York, NY USPTO Classifications: 142/52 Tool Categories: woodworking machines : wood lathes : wood lathe chucks Assignees: Henry Clay Humphrey - New York, NY Siegfried Block - New York, NY Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 31, 1881 Granted: Mar. 14, 1882 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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