Granted Patent
Utility
US 6,400,718 · App. 09/311,865
Cell switching device capable of effecting hit-less switching between an active system and a standby system
Inventors:
Susumu Yamada, Kazuho Kawaguchi, Akiyoshi Shimizu
Patented Case
View Patent ↗
Granted: Jun 4, 2002
Filed: May 14, 1999
Inventors
Susumu Yamada
Kazuho Kawaguchi
Akiyoshi Shimizu
Assignee (at issue)
OKI ELECTRIC INDUSTRY CO., LTD.
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.