Granted Patent
Utility
US 4,644,231 · App. 06/674,989
Video data display driver stage
Inventor:
James H. Wharton
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Nov 29, 1984
Inventor
James H. Wharton
Assignee (at issue)
RCA 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.