Granted Patent
Utility
US 6,477,246 · App. 09/539,375
Method and apparatus for providing expanded telecommunications service
Inventors:
Robert A. Dolan, David F. Hofstatter
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Mar 31, 2000
Inventors
Robert A. Dolan
David F. Hofstatter
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.