Granted Patent
Utility
US 5,142,243 · App. 07/618,388
Apparatus and method for an input stage of an operational amplifier
Inventor:
Dennis N. Eddlemon
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Dec 19, 1990
Inventor
Dennis N. Eddlemon
Assignee (at issue)
APEX MICROTECHNOLOGY, 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.