Granted Patent
Utility
US 5,907,235 · App. 08/771,482
Method and apparatus for generating a supply voltage for a hearing device
Inventors:
Enrique Marcelo Blumenkrantz, Erik Rasmussen
Patented Case
View Patent ↗
Granted: May 25, 1999
Filed: Dec 23, 1996
Inventors
Enrique Marcelo Blumenkrantz
Erik Rasmussen
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.