Granted Patent
Utility
US 6,831,513 · App. 10/341,404
Differential amplifier
Inventors:
Shuichi Matsumoto, Akira Yoshida
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: Jan 14, 2003
Inventors
Shuichi Matsumoto
Akira Yoshida
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.