Granted Patent
Utility
US 5,219,767 · App. 07/748,694
Process for preparing semiconductor device
Inventor:
Hiroshi Kohno
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Aug 22, 1991
Inventor
Hiroshi Kohno
Assignee (at issue)
NEC 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.