Granted Patent
Utility
US 5,858,855 · App. 08/874,737
Semiconductor substrate, process for production thereof, and semiconductor device
Inventor:
Kenya Kobayashi
Patented Case
View Patent ↗
Granted: Jan 12, 1999
Filed: Jun 13, 1997
Inventor
Kenya Kobayashi
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.