Granted Patent
Utility
US 5,483,581 · App. 08/254,919
Method and apparatus for performing an automated collect call
Inventors:
John A. Hird, Lindsey D. Owen, Michael R. Rice
Patented Case
View Patent ↗
Granted: Jan 9, 1996
Filed: Jun 6, 1994
Inventors
John A. Hird
Lindsey D. Owen
Michael R. Rice
Assignee (at issue)
Intellicall, 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.