Granted Patent
Utility
US 4,959,622 · App. 07/401,205
Operational amplifier with precise bias current control
Inventor:
Mark B. Kearney
Patented Case
View Patent ↗
Granted: Sep 25, 1990
Filed: Aug 31, 1989
Inventor
Mark B. Kearney
Assignee (at issue)
DELCO ELECTRONICS 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.