Granted Patent
Utility
US 4,823,174 · App. 07/205,573
Bipolar transistor and process of fabrication thereof
Inventors:
Tadatsugu Itoh, Hideaki Kohzu, Yasuhiro Hosono
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Jun 8, 1988
Inventors
Tadatsugu Itoh
Hideaki Kohzu
Yasuhiro Hosono
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.