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US Patent: 48,548
Improved Expanding Drill
Patentee:
Franklin Gleason - Philadelphia, PA

USPTO Classifications:
408/169

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
John H. Tibben
George R. Kirk

Patent Dates:
Granted: Jul. 04, 1865

Patent Pictures:
USPTO pdf tiff
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