Granted Patent
Utility
US 4,894,853 · App. 07/369,415
Cathode cup improvement
Inventor:
James J. Dowd
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Jun 21, 1989
Inventor
James J. Dowd
Assignee (at issue)
Siemens Medical Systems,Inc.
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.