Granted Patent
Utility
US 5,136,385 · App. 07/712,423
Adaptive vertical gray scale filter for television scan converter
Inventor:
Jack J. Campbell
Patented Case
View Patent ↗
Granted: Aug 4, 1992
Filed: Jun 10, 1991
Inventor
Jack J. Campbell
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.