Granted Patent
Utility
US 4,900,892 · App. 07/199,526
Method for working members composed of oxide material
Inventors:
Dieter Baeuerle, Michael Eyett, Helmut Thomann, Wolfram Wersing
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: May 27, 1988
Inventors
Dieter Baeuerle
Michael Eyett
Helmut Thomann
Wolfram Wersing
Assignee (at issue)
Siemens Aktiengesellschaft
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.