Granted Patent
Utility
US 4,837,670 · App. 07/247,030
Bias source for a switchmode converter
Inventor:
Bonifacio Diaz
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Sep 20, 1988
Inventor
Bonifacio Diaz
Assignee (at issue)
Zenith Electronics 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.