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US Patent: 529,023
Rotary support for hand drills
Patentee: John W. Duff (exact or similar names) - Old Orchard, ME USPTO Classifications: 408/92 Tool Categories: Assignees: William J. Mewer - Old Orchard, ME Duff Construction Co. - Old Orchard, ME Manufacturer: Armstrong-Duff Machine Co. - Phladelphia, PA Duff Machine Co. - Lowell, MA Witnesses: Luther R. Moore H. Fairfield	Patent Dates: Applied: Dec. 11, 1893 Granted: Nov. 13, 1894 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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