Granted Patent
Utility
US 4,931,787 · App. 07/197,553
Active matrix addressed display system
Inventor:
John M. Shannon
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: May 23, 1988
Inventor
John M. Shannon
Assignee (at issue)
U.S. Philips 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.