Granted Patent
Utility
US 4,539,676 · App. 06/417,504
Bulk/interactive data switching system
Inventor:
James Lucas
Patented Case
View Patent ↗
Granted: Sep 3, 1985
Filed: Sep 13, 1982
Inventor
James Lucas
Assignee (at issue)
AT&T Bell Laboratories
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.