Granted Patent
Utility
US 4,891,740 · App. 07/333,775
DC power supply with digitally controlled power switch
Inventor:
Alan E. Brown
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Apr 5, 1989
Inventor
Alan E. Brown
Assignee (at issue)
Compaq Computer 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.