Granted Patent
Utility
US 4,748,489 · App. 06/842,797
Integrated circuit semiconductor device having improved isolation region
Inventor:
Michio Komatsu
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Mar 24, 1986
Inventor
Michio Komatsu
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.