Granted Patent
Utility
US 4,270,214 · App. 06/023,795
High impedance tap for tapped bus transmission systems
Inventors:
William W. Davis, Ernest S. Griffith
Patented Case
View Patent ↗
Granted: May 26, 1981
Filed: Mar 26, 1979
Inventors
William W. Davis
Ernest S. Griffith
Assignee (at issue)
Sperry 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.