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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 ]
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Description:
The example shown in the second image is marked, "Krebs,May,12,1868".

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