Granted Patent
Utility
US 4,893,054 · App. 07/163,702
Shadow mask type color cathode ray tube
Inventor:
Hiroo Kobayashi
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Mar 3, 1988
Inventor
Hiroo Kobayashi
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.