Granted Patent
Utility
US 4,943,741 · App. 07/356,785
ECL/CML emitter follower current switch circuit
Inventors:
Julio Estrada, Roy L. Yarbrough
Patented Case
View Patent ↗
Granted: Jul 24, 1990
Filed: May 24, 1989
Inventors
Julio Estrada
Roy L. Yarbrough
Assignee (at issue)
NATIONAL SEMICONDUCTOR 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.