Granted Patent
Utility
US 5,490,251 · App. 07/742,987
Method and apparatus for transmitting data over a signalling channel in a digital telecommunications network
Inventors:
William E. Clark, Lonnie A. Olson
Patented Case
View Patent ↗
Granted: Feb 6, 1996
Filed: Aug 9, 1991
Inventors
William E. Clark
Lonnie A. Olson
Assignee (at issue)
FIRST DATA RESOURCES, LLC.
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.