Granted Patent
Utility
US 4,556,842 · App. 06/517,497
Tracking filter for sensing DC content in an AC waveform
Inventor:
Mark A. Rosswurm
Patented Case
View Patent ↗
Granted: Dec 3, 1985
Filed: Jul 26, 1983
Inventor
Mark A. Rosswurm
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.