Granted Patent
Utility
US 4,837,452 · App. 07/259,842
Off-line dc power supply
Inventor:
Donald S. Peterson
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Oct 19, 1988
Inventor
Donald S. Peterson
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.