Granted Patent
Utility
US 4,514,842 · App. 06/548,484
T-S-T-S-T Digital switching network
Inventor:
Robert E. Renner
Patented Case
View Patent ↗
Granted: Apr 30, 1985
Filed: Nov 3, 1983
Inventor
Robert E. Renner
Assignee (at issue)
GTE Automatic Electric Incorporated
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.