Granted Patent
Utility
US 5,146,397 · App. 07/626,654
Power supply device with unbalance monitoring circuit
Inventor:
Gerhard Fruhling
Patented Case
View Patent ↗
Granted: Sep 8, 1992
Filed: Dec 13, 1990
Inventor
Gerhard Fruhling
Assignee (at issue)
U.S. Philips 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.