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US Patent: 968,372
Ball-bearing
Patentee: George O. Leopold (exact or similar names) - Philadelphia, PA USPTO Classifications: 384/617 Tool Categories: woodworking machines : specialty woodworking machines : tool making machines Assignees: North Brothers Manufacturing Co. - Philadelphia, PA Manufacturer: Not known to have been produced Witnesses: Henry Howson William A. Barr	Patent Dates: Applied: Aug. 27, 1909 Granted: Aug. 23, 1910 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward George Langford

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