Granted Patent
Utility
US 4,622,686 · App. 06/662,821
Up/down counter interface means
Inventor:
Robert S. Lundin
Patented Case
View Patent ↗
Granted: Nov 11, 1986
Filed: Oct 19, 1984
Inventor
Robert S. Lundin
Assignee (at issue)
Superior Electron, LLC
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.