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Patent number:
Patent Date:
US Patent: 426,710
Die for Making Rock Drills
Patentee:
John Cahill (
exact
or
similar
names) - Tarrytown, Westchester County, NY
USPTO Classifications:
72/429
,
72/467
Tool Categories:
metalworking machines
:
forging machines
:
forging dies
tool making
:
making drills and augers
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Jan. 31, 1890
Granted:
Apr. 29, 1890
Patent Pictures:
USPTO
(New site tip)
Google Patents
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