Granted Patent
Utility
US 4,916,603 · App. 07/170,483
Distributed reference and change table for a virtual memory system
Inventors:
Robert P. Ryan, Kin Cheung
Patented Case
View Patent ↗
Granted: Apr 10, 1990
Filed: Mar 18, 1985
Inventors
Robert P. Ryan
Kin Cheung
Assignee (at issue)
Wang Laboratories, 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.