Granted Patent
Utility
US 4,864,488 · App. 07/211,950
Single level D.C. output voltage power supply
Inventors:
David J. Bulmahn, David Schaffner
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Jun 27, 1988
Inventors
David J. Bulmahn
David Schaffner
Assignee (at issue)
NCR Corporation
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.