Granted Patent
Utility
US 5,798,561 · App. 08/730,083
Bipolar transistor with polysilicon base
Inventor:
Fumihiko Sato
Patented Case
View Patent ↗
Granted: Aug 25, 1998
Filed: Oct 15, 1996
Inventor
Fumihiko Sato
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.