Granted Patent
Utility
US 4,814,760 · App. 07/045,732
Information display and entry device
Inventors:
James P. Johnston, Donald L. Russell
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Apr 30, 1987
Inventors
James P. Johnston
Donald L. Russell
Assignee (at issue)
Wang Laboratories, 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.