Granted Patent
Utility
US 4,950,947 · App. 07/267,562
Cathode ray tube containing an anode which yields minimal X-ray emission
Inventor:
Koji Nakamura
Patented Case
View Patent ↗
Granted: Aug 21, 1990
Filed: Nov 7, 1988
Inventor
Koji Nakamura
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.