Granted Patent
Utility
US 4,821,034 · App. 07/011,842
Digital exchange switch element and network
Inventors:
Terry M. Anderson, Robert S. Cornelius
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Feb 6, 1987
Inventors
Terry M. Anderson
Robert S. Cornelius
Assignee (at issue)
Ancor Communications, Inc.
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.