Granted Patent
Utility
US 5,451,839 · App. 08/003,413
Portable real time cellular telephone and pager network system monitor
Inventors:
Theodore S. Rappaport, Joseph G. Liberti, Scott McCulley, Michael D. Keitz
Patented Case
View Patent ↗
Granted: Sep 19, 1995
Filed: Jan 12, 1993
Inventors
Theodore S. Rappaport
Joseph G. Liberti
Scott McCulley
Michael D. Keitz
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.