Granted Patent
Utility
US 4,811,097 · App. 07/114,685
Video signal processor
Inventors:
David W. Ritter, Anthony Eugene Zortea
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Oct 29, 1987
Inventors
David W. Ritter
Anthony Eugene Zortea
Assignee (at issue)
Videotek, 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.