Granted Patent
Utility
US 5,645,461 · App. 08/266,110
Method of manufacturing projection cathode ray tube with uniform optical multiple interference film
Inventor:
Yasuo Iwasaki
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: Jun 27, 1994
Inventor
Yasuo Iwasaki
Assignee (at issue)
MITSUBISHI ELECTRIC CORPORATION
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.