Granted Patent
Utility
US 4,845,640 · App. 07/024,689
High-speed dual mode graphics memory
Inventors:
Robert S. Ballard, Steven Clark
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Mar 11, 1987
Inventors
Robert S. Ballard
Steven Clark
Assignee (at issue)
MegaScan Technology, Inc.
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.