Granted Patent
Utility
US 4,454,479 · App. 06/451,024
Operational amplifier with improved output capability
Inventor:
Dewayne A. Spires
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Dec 20, 1982
Inventor
Dewayne A. Spires
Assignee (at issue)
Bell Telephone Laboratories, 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.