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US Patent: RE3,733
Improvement in expansive bits
Patentee:
William A. Clark - Woodbridge, CT

USPTO Classifications:
408/194, 408/195, 408/213

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

Assignees:
None

Manufacturer:
William A. Clark - Bethany, CT

Witnesses:
W. H. McCabe
M. Bailey

Patent Dates:
Granted: Nov. 16, 1869

Reissue Information:
Reissue of RE3,516 (Jun. 22, 1869)
Reissued as RE4,668 (Dec. 12, 1871)

Patent Pictures:
USPTO pdf tiff
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