Granted Patent
Utility
US 5,422,940 · App. 07/871,411
Global subscriber group service system
Inventors:
Kazumi Endo, Mitsuyuki Mizuno, Nobuo Horiba, Kenji Awaji, Yoshiji Tanimoto
Patented Case
View Patent ↗
Granted: Jun 6, 1995
Filed: Apr 20, 1992
Inventors
Kazumi Endo
Mitsuyuki Mizuno
Nobuo Horiba
Kenji Awaji
Yoshiji Tanimoto
Assignees (at issue)
Fujitsu Limited
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
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.