Granted Patent
Utility
US 4,736,339 · App. 06/808,975
Circuit for simplex I/O terminal control by duplex processors
Inventor:
Edwin P. Crabbe, Jr.
Patented Case
View Patent ↗
Granted: Apr 5, 1988
Filed: Dec 16, 1985
Inventor
Edwin P. Crabbe, Jr.
Assignee (at issue)
GTE Communication Systems 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.