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US Patent: 890,894
Bit-Extender
Patentees:
William H. Ehrhart - Lancaster, PA
George W. Leonard - Lancaster, PA

USPTO Classifications:
279/52, 403/161, 403/317

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. L. Grost
H. S. Mentzer

Patent Dates:
Applied: Feb. 11, 1908
Granted: Jun. 16, 1908

Patent Pictures:
USPTO pdf tiff
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