Granted Patent
Utility
US 4,908,328 · App. 07/361,894
High voltage power IC process
Inventors:
Chenming Hu, Steven Sapp
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Jun 6, 1989
Inventors
Chenming Hu
Steven Sapp
Assignee (at issue)
NATIONAL SEMICONDUCTOR 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.