Granted Patent
Utility
US 4,518,936 · App. 06/551,587
Commutating filter passing only the fundamental frequency and odd harmonics thereof
Inventor:
Eldon M. Sutphin
Patented Case
View Patent ↗
Granted: May 21, 1985
Filed: Nov 14, 1983
Inventor
Eldon M. Sutphin
Assignee (at issue)
RCA 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.