Granted Patent
Utility
US 6,721,565 · App. 09/632,814
Handover of wireless calls between systems supporting circuit and packet call models
Inventors:
Richard P. Ejzak, John Matthew Gafrick, Harold Aaron Lassers, Ronald Martin
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Aug 7, 2000
Inventors
Richard P. Ejzak
John Matthew Gafrick
Harold Aaron Lassers
Ronald Martin
Assignee (at issue)
LUCENT TECHNOLOGIES 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.