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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)
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