US Patent: 270,235 - Machine for Cutting Helical Grooves in Twist Drills


	Home\| FAQ	Search:Advanced\|Person\|Company\| Type\|Class	Login


Quick search:	Patent number:	Patent Date:

US Patent: 270,235

Machine for Cutting Helical Grooves in Twist Drills

Patentee:

Johann Martignoni (exact or similar names) - Bockenheim, Hesse, Germany

USPTO Classifications:

409/167

Tool Categories:

tool making : making drills and augers

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Sep. 20, 1882
Granted:	Jan. 09, 1883

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens

Description:

Patented in Germany, 27 Jan., 1882, #2,035; in Belgium, 28 Jan., 1882, #56,917; in France, 17 Feb., 1882, #147,412 and in England, 17 Jul., 1882, #3,384.