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US Patent: 2,664,821
Method of and means for varying the circumference of printing cylinders
Patentee: Harold W. Huffman (exact or similar names) - Hamilton, OH USPTO Classifications: 101/378, 101/415.1 Tool Categories: Assignees: Hamilton Tool Co. - Hamilton, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 13, 1951 Granted: Jan. 05, 1954 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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