Granted Patent
Utility
US 4,439,821 · App. 06/343,744
DC to DC switching regulator with temperature compensated isolated feedback circuitry
Inventor:
James M. Grippe
Patented Case
View Patent ↗
Granted: Mar 27, 1984
Filed: Jan 29, 1982
Inventor
James M. Grippe
Assignee (at issue)
Varo 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.