Granted Patent
Utility
US 5,045,644 · App. 07/509,601
Touch sensitive screen with improved corner response
Inventor:
David I. Dunthorn
Patented Case
View Patent ↗
Granted: Sep 3, 1991
Filed: Apr 16, 1990
Inventor
David I. Dunthorn
Assignee (at issue)
Elographics, 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.