Granted Patent
Utility
US 4,539,638 · App. 06/305,239
Command language system for interactive computer
Inventor:
John Gaffney
Patented Case
View Patent ↗
Granted: Sep 3, 1985
Filed: Sep 24, 1981
Inventor
John Gaffney
Assignee (at issue)
Evans & Sutherland Computer 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.