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US Patent: 242,308
Apparatus for grinding wood pulp
Patentee: Thomas Hanvey (exact or similar names) - Rochester, NY USPTO Classifications: 241/279, 241/280 Tool Categories: manufacturing : manufacturing processes : manufacturing paper Assignees: None Manufacturer: Not known to have been produced Witnesses: Chauncey Perry R. F. Osgood	Patent Dates: Applied: Mar. 17, 1880 Granted: May 31, 1881 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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