Granted Patent
Utility
US 5,657,088 · App. 08/578,300
System and method for extracting caption teletext information from a video signal
Inventor:
Robert J. Hankinson
Patented Case
View Patent ↗
Granted: Aug 12, 1997
Filed: Dec 22, 1995
Inventor
Robert J. Hankinson
Assignee (at issue)
Cirrus Logic 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.