Granted Patent
Utility
US 4,442,320 · App. 06/327,486
Remote subscriber interaction system
Inventors:
Rolland James, Ronald J. Chebra
Patented Case
View Patent ↗
Granted: Apr 10, 1984
Filed: Dec 4, 1981
Inventors
Rolland James
Ronald J. Chebra
Assignee (at issue)
Base Ten Systems, 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.