Granted Patent
Utility
US 6,658,126 · App. 09/287,242
Hearing aid compatible piezoelectric speaker
Inventor:
Trampas Stern
Patented Case
View Patent ↗
Granted: Dec 2, 2003
Filed: Apr 7, 1999
Inventor
Trampas Stern
Assignee (at issue)
ERICSSON GMBH
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.