Granted Patent
Utility
US 6,700,873 · App. 09/610,386
Apparatus for and method of detecting operation administration and maintenance (OAM) cell
Inventors:
Toshihiko Sugaya, Yumi Tanaka
Patented Case
View Patent ↗
Granted: Mar 2, 2004
Filed: Jul 5, 2000
Inventors
Toshihiko Sugaya
Yumi Tanaka
Assignee (at issue)
NEC 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.