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US Patent: 900,044
Hollow Auger
Patentee: Nils E. Swanson (exact or similar names) - Denver, CO USPTO Classifications: 175/421, 408/206 Tool Categories: woodworking tools : hand drills : drill bits : hollow bits Assignees: Nils E. Swanson - Denver, CO Robert F. Ohlin - Denver, CO Manufacturer: Not known to have been produced Witnesses: A. J. O'Brien Robert F. Ohlin	Patent Dates: Applied: Jun. 10, 1907 Granted: Sep. 29, 1908 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin (dm)

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