Granted Patent
Utility
US 5,222,213 · App. 07/507,699
Low-cost display controller comprising a DMA or communications controller operating under processor control
Inventor:
Norman W. Petty
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Apr 10, 1990
Inventor
Norman W. Petty
Assignee (at issue)
AT&T Bell Laboratories
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.