Granted Patent
Utility
US 4,988,942 · App. 07/269,238
Switched resistor regulator control when transfer function includes discontinuity
Inventor:
John P. Ekstrand
Patented Case
View Patent ↗
Granted: Jan 29, 1991
Filed: Nov 8, 1988
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.