Granted Patent
Utility
US 6,574,343 · App. 09/654,337
Hearing aid
Inventor:
Hilmar Meier
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Sep 1, 2000
Inventor
Hilmar Meier
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.