Granted Patent
Utility
US 4,230,429 · App. 05/920,532
Boring tool for making borings in solid metal material of workpieces
Inventor:
Otto Eckle
Patented Case
View Patent ↗
Granted: Oct 28, 1980
Filed: Jun 29, 1978
Inventor
Otto Eckle
Assignee (at issue)
Komet Stahlhalter-und Werkzeugfabrik Robert Breuning GmbH
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.