Granted Patent
Utility
US 4,278,965 · App. 06/075,396
Photo-optical keyboard having n-key rollover
Inventors:
Edward I. Nelson, Harry B. Mueller, John Lane
Patented Case
View Patent ↗
Granted: Jul 14, 1981
Filed: Sep 14, 1979
Inventors
Edward I. Nelson
Harry B. Mueller
John Lane
Assignee (at issue)
Burroughs, Inc.
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.