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US Patent: 984,998
Drill-holder or chuck with self-centering device for boring-machines
Patentee: Per Gotthard Blomberg (exact or similar names) - Liljeholmen, Stockholm, Sweden USPTO Classifications: 279/33 Tool Categories: metalworking machines : drilling and boring : drill presses : drill press chucks woodworking machines : wood drilling and boring : drill presses : drill press chucks Assignees: None Manufacturer: Not known to have been produced Witnesses: Albert Schroeder Anna Söderström	Patent Dates: Applied: May 01, 1909 Granted: Feb. 21, 1911 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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