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US Patent: 3,977,621
Differential driven rewinder-unwinder
Patentee: Harold W. Huffman (exact or similar names) - Hamilton, OH USPTO Classifications: 242/413.5, 242/413.7, 242/413.8 Tool Categories: Assignees: Hamilton Tool Co. - Hamilton, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 04, 1973 Granted: Aug. 31, 1976 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Hamilton Tool Co.

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