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Patent number:
Patent Date:
US Patent: 245,741
Machine for Twisting Drill Blanks
Patentees:
Parshall D. Nicols (
exact
or
similar
names) - Sewickley, Allegheny County, PA
Theodore W. Webb (
exact
or
similar
names) - Pittsburg, Allegheny County, PA
USPTO Classifications:
72/182
,
72/237
,
72/65
,
72/95
Tool Categories:
tool making
:
making drills and augers
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Feb. 28, 1881
Granted:
Aug. 16, 1881
Patent Pictures:
USPTO
(New site tip)
Google Patents
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