Granted Patent
Utility
US 6,738,461 · App. 10/033,020
Methods and apparatus for returning a call over a telephony system
Inventors:
David S. Trandal, David J. Brahm, Colin D. Kelley
Patented Case
View Patent ↗
Granted: May 18, 2004
Filed: Nov 1, 2001
Inventors
David S. Trandal
David J. Brahm
Colin D. Kelley
Assignee (at issue)
CallWave, 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.