Granted Patent
Utility
US 6,574,328 · App. 09/565,565
Telephone call control system for the public switched telephone network
Inventors:
Samuel F. Wood, Margaret Susan Asprey, Jerry A. Klein
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: May 4, 2000
Inventors
Samuel F. Wood
Margaret Susan Asprey
Jerry A. Klein
Assignee (at issue)
Telemaze LLC
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.