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US Patent: 3,096,949
Air expandable core shaft
Patentee: Harold W. Huffman (exact or similar names) - Hamilton, OH USPTO Classifications: 242/571.1, 242/571.2, 279/2.08 Tool Categories: Assignees: Hamilton Tool Co. - Hamilton, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 15, 1958 Granted: Jul. 09, 1963 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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