Granted Patent
Utility
US 4,644,458 · App. 06/712,990
Electric power supply circuit capable of reducing a loss of electric power
Inventors:
Yoshihiko Harafuji, Hideki Yamamoto, Katsuhiko Yamamoto
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Mar 18, 1985
Inventors
Yoshihiko Harafuji
Hideki Yamamoto
Katsuhiko Yamamoto
Assignees (at issue)
NEC CORPORATION
Nippon Telegraph and Telephone Public 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.