Granted Patent
Utility
US 4,499,457 · App. 06/378,149
Shadow mask color system with calligraphic displays
Inventor:
Richard A. Hintze
Patented Case
View Patent ↗
Granted: Feb 12, 1985
Filed: May 14, 1982
Inventor
Richard A. Hintze
Assignee (at issue)
Evans & Sutherland Computer 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.