Granted Patent
Utility
US 5,809,151 · App. 08/840,884
Hearing aid
Inventor:
Kunibert Husung
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Apr 17, 1997
Inventor
Kunibert Husung
Assignee (at issue)
Siemens Audiologische Technik 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.