Granted Patent
Utility
US 4,701,756 · App. 06/774,493
Fault-tolerant hierarchical network
Inventor:
William E. Burr
Patented Case
View Patent ↗
Granted: Oct 20, 1987
Filed: Sep 10, 1985
Inventor
William E. Burr
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.