Granted Patent
Utility
US 4,926,460 · App. 07/249,015
Universal PSTN page entry protocol
Inventors:
Jose Gutman, Steven J. Goldberg, Linda Trine
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: Sep 26, 1988
Inventors
Jose Gutman
Steven J. Goldberg
Linda Trine
Assignee (at issue)
Motorola, 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.