Granted Patent
Utility
US 6,496,587 · App. 09/504,322
Hearing aid
Inventor:
Josef Mueller
Patented Case
View Patent ↗
Granted: Dec 17, 2002
Filed: Feb 14, 2000
Inventor
Josef Mueller
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.