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US Patent: 445,879
Driving Wheel for Dental Engines
Patentee: John Smalley Campbell (exact or similar names) - London, Middlesex County, England USPTO Classifications: 474/176, 474/195 Tool Categories: specialty machines : dental apparatus Assignees: Carroll Aluminum Mfg. Co - New York, NY Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 13, 1890 Granted: Feb. 03, 1891 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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