Granted Patent
Utility
US 4,499,531 · App. 06/438,794
Power converter
Inventor:
William Bray
Patented Case
View Patent ↗
Granted: Feb 12, 1985
Filed: Nov 3, 1982
Inventor
William Bray
Assignee (at issue)
501 Gateway Technology, 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.