Granted Patent
Utility
US 4,602,129 · App. 06/427,591
Electronic audio communications system with versatile message delivery
Inventors:
Gordon H. Matthews, Thomas B. Tansil, Michael L. Fannin
Patented Case
View Patent ↗
Granted: Jul 22, 1986
Filed: Sep 29, 1982
Inventors
Gordon H. Matthews
Thomas B. Tansil
Michael L. Fannin
Assignee (at issue)
VMX, 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.