Granted Patent
Utility
US 6,411,287 · App. 09/392,577
Stress seal for acoustic wave touchscreens
Inventors:
Daniel H. Scharff, Don Armstrong
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Sep 8, 1999
Inventors
Daniel H. Scharff
Don Armstrong
Assignee (at issue)
ELO TouchSystems, 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.