Granted Patent
Utility
US 5,802,183 · App. 08/567,942
BTE assistive listening receiver with interchangeable crystals
Inventors:
Tom Scheller, Scott Posner, Art Johnson, Pat Henry, Irene Teske, Mark A. Gilbertson
Patented Case
View Patent ↗
Granted: Sep 1, 1998
Filed: Dec 6, 1995
Inventors
Tom Scheller
Scott Posner
Art Johnson
Pat Henry
Irene Teske
Mark A. Gilbertson
Assignee (at issue)
Telex Communications, 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.