Granted Patent
Utility
US 4,757,434 · App. 07/041,042
Control circuit used for a power conversion apparatus
Inventors:
Takao Kawabata, Yushin Yamamoto
Patented Case
View Patent ↗
Granted: Jul 12, 1988
Filed: Apr 21, 1987
Inventors
Takao Kawabata
Yushin Yamamoto
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.