Granted Patent
Utility
US 6,566,843 · App. 10/118,898
DC power source unit with battery charging function
Inventors:
Nobuhiro Takano, Takeshi Takeda, Eiji Nakayama, Kazuhiko Funabashi
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Apr 10, 2002
Inventors
Nobuhiro Takano
Takeshi Takeda
Eiji Nakayama
Kazuhiko Funabashi
Assignee (at issue)
Hitachi Koki 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.