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US Patent: 281,568
Extension-Shank for Bits
Patentee:
Caspar Schoch - Truckee, CA

USPTO Classifications:
279/56, 279/91

Tool Categories:
woodworking tools : hand drills : drill bit extensions

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
James L. Norris
J. A. Rutherford

Patent Dates:
Applied: Jun. 15, 1883
Granted: Jul. 17, 1883

Patent Pictures:
USPTO pdf tiff
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