Granted Patent
Utility
US 5,444,770 · App. 08/158,994
Telephone handset interface for automatic switching between voice and data communications
Inventors:
Richard A. Davis, Kenneth L. Frick, Gregory Muir, James Nowack
Patented Case
View Patent ↗
Granted: Aug 22, 1995
Filed: Nov 30, 1993
Inventors
Richard A. Davis
Kenneth L. Frick
Gregory Muir
James Nowack
Assignee (at issue)
Radish Communication Systems, 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.