Granted Patent
Utility
US 4,771,420 · App. 06/939,036
Time slot interchange digital switched matrix
Inventors:
Stephen A. Deschaine, Michael K. Corry
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: Dec 8, 1986
Inventors
Stephen A. Deschaine
Michael K. Corry
Assignee (at issue)
DSC Communications 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.