Granted Patent
Utility
US 6,788,798 · App. 09/166,404
Method and arrangement for improving leak tolerance of an earpiece
Inventor:
Juha Backman
Patented Case
View Patent ↗
Granted: Sep 7, 2004
Filed: Oct 5, 1998
Inventor
Juha Backman
Assignee (at issue)
Nokia Mobile Phones Ltd.
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.