Granted Patent
Utility
US 5,640,073 · App. 08/525,830
Brushless dc motor unit and method of driving the unit
Inventors:
Hideo Ikeda, Masao Osawa, Masahiro Matsushima
Patented Case
View Patent ↗
Granted: Jun 17, 1997
Filed: Sep 8, 1995
Inventors
Hideo Ikeda
Masao Osawa
Masahiro Matsushima
Assignee (at issue)
SANDEN 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.