Granted Patent
Utility
US 5,526,422 · App. 08/262,809
System and method for cleaning the display screen of a touch screen device
Inventor:
Donald Marion Keen
Patented Case
View Patent ↗
Granted: Jun 11, 1996
Filed: Jun 20, 1994
Inventor
Donald Marion Keen
Assignee (at issue)
AT&T 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.