Granted Patent
Utility
US 5,899,847 · App. 08/908,243
Implantable middle-ear hearing assist system using piezoelectric transducer film
Inventors:
Theodore P. Adams, Bruce A. Brillhart, Donald J. Bushek, Kai Kroll
Patented Case
View Patent ↗
Granted: May 4, 1999
Filed: Aug 7, 1997
Inventors
Theodore P. Adams
Bruce A. Brillhart
Donald J. Bushek
Kai Kroll
Assignee (at issue)
St. Croix Medical, Inc.
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.