Granted Patent
Utility
US 6,674,657 · App. 10/041,594
Overvoltage-protective device for power system, AC/DC converter and DC/DC converter constituting the power system
Inventors:
Yoshihiro Nagaya, Kyuichi Takimoto, Toshiyuki Matsuyama
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: Jan 10, 2002
Inventors
Yoshihiro Nagaya
Kyuichi Takimoto
Toshiyuki Matsuyama
Assignee (at issue)
Fujitsu Limited
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.