Granted Patent
Utility
US 5,831,837 · App. 08/860,041
Switch mode power supply
Inventors:
David Coyne, David Alexander Grant, Ewan James Lister, Lindsay Gordon Taylor
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: Jun 9, 1997
Inventors
David Coyne
David Alexander Grant
Ewan James Lister
Lindsay Gordon Taylor
Assignee (at issue)
International Business Machines 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.