Granted Patent
Utility
US 4,878,239 · App. 07/197,028
Anonymous interactive telephone system with expanded outward calling features
Inventors:
Merrill Solomon, John Kimball
Patented Case
View Patent ↗
Granted: Oct 31, 1989
Filed: May 19, 1988
Inventors
Merrill Solomon
John Kimball
Assignee (at issue)
The Telephone Connection
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.