Granted Patent
Utility
US 4,122,401 · App. 05/815,734
High efficiency power amplifier circuit
Inventor:
Donald R. Sauer
Patented Case
View Patent ↗
Granted: Oct 24, 1978
Filed: Jul 14, 1977
Inventor
Donald R. Sauer
Assignee (at issue)
NATIONAL SEMICONDUCTOR 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.