Granted Patent
Utility
US 5,289,359 · App. 07/869,875
DC-DC power converter including sensing means for providing an output when the reserve power of the converter falls below a predetermined amount for a given input voltage
Inventor:
Mark S. Ziermann
Patented Case
View Patent ↗
Granted: Feb 22, 1994
Filed: Apr 16, 1992
Inventor
Mark S. Ziermann
Assignee (at issue)
Charles Industries, Ltd.
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.