Granted Patent
Utility
US 4,689,767 · App. 06/790,631
Magnetic tape drive controller utilizing dual DMA controllers
Inventors:
Alexander Stevenson, David M. Lounsbury
Patented Case
View Patent ↗
Granted: Aug 25, 1987
Filed: Oct 22, 1985
Inventors
Alexander Stevenson
David M. Lounsbury
Assignee (at issue)
Prime Computer, 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.