Granted Patent
Utility
US 4,194,136 · App. 05/807,602
Input stage using junction field effect transistors for biasing
Inventor:
James R. Butler
Patented Case
View Patent ↗
Granted: Mar 18, 1980
Filed: Jun 17, 1977
Inventor
James R. Butler
Assignee (at issue)
Fairchild Camera & Instrument Corp.
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.