Granted Patent
Utility
US 5,204,902 · App. 07/759,314
Cellular telephony authentication arrangement
Inventors:
James Alexander Reeds, III, Philip Andrew Treventi, I-Hsiang Yu
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Sep 13, 1991
Inventors
James Alexander Reeds, III
Philip Andrew Treventi
I-Hsiang Yu
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.