Granted Patent
Utility
US 6,751,468 · App. 09/474,446
Systems and methods for providing push to talk feature for wireless communication systems
Inventors:
Michael Heubel, Mark Austin
Patented Case
View Patent ↗
Granted: Jun 15, 2004
Filed: Dec 29, 1999
Inventors
Michael Heubel
Mark Austin
Assignee (at issue)
BELLSOUTH INTELLECTUAL PROPERTY CORPORATION
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.