Granted Patent
Utility
US 6,463,144 · App. 09/707,981
Internet telephony callback system and method of operation
Inventors:
James M. Dunn, Edith H. Stern
Patented Case
View Patent ↗
Granted: Oct 8, 2002
Filed: Nov 8, 2000
Inventors
James M. Dunn
Edith H. Stern
Assignee (at issue)
International Business Machines 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.