Granted Patent
Utility
US 4,333,030 · App. 06/130,877
Image converter tube with contrast enhancing filter which partially absorbs internally reflected light
Inventor:
Louis T. Zitelli
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Mar 17, 1980
Inventor
Louis T. Zitelli
Assignee (at issue)
Varian, 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.