Granted Patent
Utility
US 6,831,988 · App. 10/361,232
Behind-the-ear hearing aid and attachment module for same
Inventor:
Andi Vonlanthen
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: Feb 10, 2003
Inventor
Andi Vonlanthen
Assignee (at issue)
Phonak AG
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.