Granted Patent
Utility
US 5,239,455 · App. 07/777,804
Charge pump circuit
Inventors:
Ian G. Fobbester, Peter Good
Patented Case
View Patent ↗
Granted: Aug 24, 1993
Filed: Oct 17, 1991
Inventors
Ian G. Fobbester
Peter Good
Assignee (at issue)
Plessey Semiconductors Ltd
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.