Granted Patent
Utility
US 5,187,108 · App. 07/641,737
Method of manufacturing a bipolar transistor
Inventor:
Masahiko Shinozawa
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Jan 14, 1991
Inventor
Masahiko Shinozawa
Assignee (at issue)
OKI ELECTRIC INDUSTRY CO., LTD.
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.