Granted Patent
Utility
US 5,245,524 · App. 07/785,819
DC-DC converter of charge pump type
Inventors:
Shinichi Nakagawa, Hidenobu Ito
Patented Case
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Granted: Sep 14, 1993
Filed: Oct 31, 1991
Inventors
Shinichi Nakagawa
Hidenobu Ito
Assignees (at issue)
Fujitsu Limited
Fujitsu VLSI Limited
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.