Granted Patent
Utility
US 5,307,256 · App. 07/991,766
Trickle charge circuit for an off-line switching power supply
Inventor:
Robert A. Silverstein
Patented Case
View Patent ↗
Granted: Apr 26, 1994
Filed: Dec 17, 1992
Inventor
Robert A. Silverstein
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.