Granted Patent
Utility
US 4,983,995 · App. 07/337,089
Exposure device for forming phosphor deposited screen in in-line cathode ray tube
Inventor:
Takashi Sugahara
Patented Case
View Patent ↗
Granted: Jan 8, 1991
Filed: Apr 12, 1989
Inventor
Takashi Sugahara
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.