Granted Patent
Utility
US 4,366,521 · App. 06/126,092
Sequence filters for determining the symmetrical components of multiphase AC power systems
Inventor:
Ralph D. Jessee
Patented Case
View Patent ↗
Granted: Dec 28, 1982
Filed: Feb 29, 1980
Inventor
Ralph D. Jessee
Assignee (at issue)
Westinghouse Electric Company LLC
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.