Granted Patent
Utility
US 4,564,938 · App. 06/532,095
Digital electronic switching systems
Inventor:
Gordon P. Boot
Patented Case
View Patent ↗
Granted: Jan 14, 1986
Filed: Sep 14, 1983
Inventor
Gordon P. Boot
Assignee (at issue)
Plessey Overseas Limited
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.