Granted Patent
Utility
US 6,556,564 · App. 09/780,685
Scheduled internet protocol telephone instrument system
Inventor:
Steven Rogers
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Feb 8, 2001
Inventor
Steven Rogers
Assignee (at issue)
CETACEAN NETWORKS, 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.