Granted Patent
Utility
US 4,843,535 · App. 07/249,476
Switching power supply
Inventor:
Erich Fuchs
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Sep 26, 1988
Inventor
Erich Fuchs
Assignee (at issue)
Nixdorf Computer AG
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.