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US Patent: 207,113
Improvement in drill-chucks
Patentees: Andrew H. Briggs (exact or similar names) - Jersey City, NJ Charles Elterich (exact or similar names) - New York, NY USPTO Classifications: 279/49 Tool Categories: woodworking tools : hand drills : drill chucks Assignees: None Manufacturer: Charles Elterich - New York, NY Witnesses: Vernon H. Harris Benjamin W. Hoffman	Patent Dates: Applied: Feb. 01, 1878 Granted: Aug. 20, 1878 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Charles Elterich
Description: Improvements to patents 195,997 and 196,205.

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