Granted Patent
Utility
US 6,188,589 · App. 09/489,022
Inverter
Inventors:
Hideo Okayama, Taichiro Tsuchiya, Hiroaki Yamaguchi
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Jan 21, 2000
Inventors
Hideo Okayama
Taichiro Tsuchiya
Hiroaki Yamaguchi
Assignee (at issue)
MITSUBISHI ELECTRIC 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.