Granted Patent
Utility
US 4,591,973 · App. 06/501,232
Input/output system and method for digital computers
Inventors:
Fred O. Ferris, III, Harri G. Prival
Patented Case
View Patent ↗
Granted: May 27, 1986
Filed: Jun 6, 1983
Inventors
Fred O. Ferris, III
Harri G. Prival
Assignee (at issue)
Sperry Corp.
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.