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US Patent: 77,819
Improvement in countersinks
Patentee: Charles Krebs (exact or similar names) - West Springfield, MA USPTO Classifications: 144/240, 408/209 Tool Categories: woodworking tools : hand drills : drill bits : countersinks Assignees: None Manufacturer: Charles Krebs - West Springfield, MA Witnesses: J. P. Buckland T. A. Curtis	Patent Dates: Granted: May 12, 1868 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: The example shown in the second image is marked, "Krebs,May,12,1868".

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