Granted Patent
Utility
US 4,719,404 · App. 06/945,924
Switched resistor regulator with linear dissipative regulator
Inventor:
John P. Ekstrand
Patented Case
View Patent ↗
Granted: Jan 12, 1988
Filed: Dec 23, 1986
Inventor
John P. Ekstrand
Assignee (at issue)
Spectra-Physics, 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.