Granted Patent
Utility
US 5,114,868 · App. 07/561,191
Manufacturing method of well region in coms intergrated circuit
Inventor:
Hiroshi Yoshida
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Aug 1, 1990
Inventor
Hiroshi Yoshida
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.