Granted Patent
Utility
US 6,104,821 · App. 08/919,210
Electrical hearing aid device with high frequency electromagnetic radiation protection
Inventor:
Kunibert Husung
Patented Case
View Patent ↗
Granted: Aug 15, 2000
Filed: Aug 28, 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.