Granted Patent
Utility
US 4,507,713 · App. 06/540,593
Wide frequency multi-phase undervoltage detection circuit
Inventor:
Samuel C. Hsieh
Patented Case
View Patent ↗
Granted: Mar 26, 1985
Filed: Oct 11, 1983
Inventor
Samuel C. Hsieh
Assignee (at issue)
ALLIED CONSULTING, INC.
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.