Granted Patent
Utility
US 6,137,147 · App. 09/253,503
Bipolar transistor and semiconductor integrated circuit device
Inventor:
Naoto Saitou
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Feb 19, 1999
Inventor
Naoto Saitou
Assignee (at issue)
SEIKO INSTRUMENTS INC.
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.