Granted Patent
Utility
US 4,449,065 · App. 06/308,070
Tri-level input buffer
Inventor:
Thomas Davies
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Oct 2, 1981
Inventor
Thomas Davies
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.