Granted Patent
Utility
US 6,731,997 · App. 09/916,026
Method for manufacturing hearing devices
Inventors:
Hans Hessel, Christoph Widmer
Patented Case
View Patent ↗
Granted: May 4, 2004
Filed: Jul 26, 2001
Inventors
Hans Hessel
Christoph Widmer
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.