Granted Patent
Utility
US 5,001,399 · App. 07/482,297
Power supply for vacuum fluorescent displays
Inventor:
David L. Layden
Patented Case
View Patent ↗
Granted: Mar 19, 1991
Filed: Feb 16, 1990
Inventor
David L. Layden
Assignee (at issue)
Best Power Technology, Incorporated
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.