Granted Patent
Utility
US 6,307,175 · App. 09/273,756
Method of producing a noncircular cooling bore
Inventors:
Michael Blöchlinger, Ivan Luketic, Klaus Semmler, Gunter Wilfert
Patented Case
View Patent ↗
Granted: Oct 23, 2001
Filed: Mar 22, 1999
Inventors
Michael Blöchlinger
Ivan Luketic
Klaus Semmler
Gunter Wilfert
Assignee (at issue)
ABB RESEARCH LTD.
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.