Granted Patent
Utility
US 4,180,780 · App. 05/947,629
Input decoupling circuit for transistor differential amplifier
Inventor:
Paul S. Rumbaugh
Patented Case
View Patent ↗
Granted: Dec 25, 1979
Filed: Oct 2, 1978
Inventor
Paul S. Rumbaugh
Assignee (at issue)
Altec, 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.