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US Patent: 358,731
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Patentee:
Hiram Clark (exact or similar names) - Syracuse, NY

USPTO Classifications:
408/187

Tool Categories:
woodworking tools : hand drills : drill bits : countersinks

Assignees:
None

Manufacturer:
Syracuse Twist Drill Co. - Syracuse, NY

Witnesses:
A. D. Allen
Wm. C. Raymond
Patent Dates:
Applied: Dec. 06, 1886
Granted: Mar. 01, 1887

Patent Pictures: [ 1 | 2 | 3 ]
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Description:
Segmented construction which provides for separating the two cutting lips for ease of sharpening.

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