Granted Patent
Utility
US 6,040,987 · App. 09/053,300
DC-DC converter unit
Inventors:
Kenji Kudo, Kohji Kuwabara, Shigeharu Yamashita, Kazutoshi Fuchigami, Norikazu Katsuyama
Patented Case
View Patent ↗
Granted: Mar 21, 2000
Filed: Apr 1, 1998
Inventors
Kenji Kudo
Kohji Kuwabara
Shigeharu Yamashita
Kazutoshi Fuchigami
Norikazu Katsuyama
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.