Granted Patent
Utility
US 6,138,019 · App. 08/763,420
Cellular system hand-off protocol
Inventors:
Michael L. Trompower, Douglas A. Smith, Philip H. Belanger, Andrew J. Spry, Nainesh P. Shah
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Dec 11, 1996
Inventors
Michael L. Trompower
Douglas A. Smith
Philip H. Belanger
Andrew J. Spry
Nainesh P. Shah
Assignee (at issue)
Cisco Systems 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.