Granted Patent
Utility
US 5,801,935 · App. 08/708,804
Digital power factor correction circuit
Inventors:
David Mark Sugden, Phillip Gerard Langhorst, Joseph G. Marcinkiewicz, James Christopher Rudd Smart
Patented Case
View Patent ↗
Granted: Sep 1, 1998
Filed: Sep 9, 1996
Inventors
David Mark Sugden
Phillip Gerard Langhorst
Joseph G. Marcinkiewicz
James Christopher Rudd Smart
Assignees (at issue)
Emerson Electric Co.
Switched Reluctance Drives 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.