Granted Patent
Utility
US 6,476,521 · App. 09/653,265
Power oscillation protection
Inventors:
Per-Anders Lof, Daniel Karlsson
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Aug 31, 2000
Inventors
Per-Anders Lof
Daniel Karlsson
Assignee (at issue)
ABB AB
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.