Granted Patent
Utility
US 5,982,853 · App. 08/653,732
Telephone for the deaf and method of using same
Inventor:
Raanan Liebermann
Patented Case
View Patent ↗
Granted: Nov 9, 1999
Filed: May 23, 1996
Inventor
Raanan Liebermann
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.