Granted Patent
Utility
US 4,354,264 · App. 06/159,736
Digital ring control system for digital multiplexer
Inventor:
Walter K. Wurst
Patented Case
View Patent ↗
Granted: Oct 12, 1982
Filed: Jun 16, 1980
Inventor
Walter K. Wurst
Assignee (at issue)
International Standard Electric 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.