Granted Patent
Utility
US 5,329,573 · App. 07/799,580
Arrangement for obtaining authentication key parameters in a cellular mobile telecommunications switching network
Inventors:
Cheng-Tze Chang, Chinmei Chen Lee, Yie-de Zhu
Patented Case
View Patent ↗
Granted: Jul 12, 1994
Filed: Nov 27, 1991
Inventors
Cheng-Tze Chang
Chinmei Chen Lee
Yie-de Zhu
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.