Granted Patent
Utility
US 4,752,777 · App. 07/048,982
Delta network of a cross-point switch
Inventor:
Peter A. Franaszek
Patented Case
View Patent ↗
Granted: Jun 21, 1988
Filed: May 12, 1987
Inventor
Peter A. Franaszek
Assignee (at issue)
International Business Machines 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.