Granted Patent
Utility
US 4,894,621 · App. 07/205,696
Circuit for five level waveform synthesis
Inventors:
Lawrence W. Koenig, David W. Cripe
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Jun 13, 1988
Inventors
Lawrence W. Koenig
David W. Cripe
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.