Granted Patent
Utility
US 4,733,140 · App. 07/000,695
Side pincushion correction circuit with automatic picture tracking
Inventor:
Kirk Oliver
Patented Case
View Patent ↗
Granted: Mar 22, 1988
Filed: Jan 6, 1987
Inventor
Kirk Oliver
Assignee (at issue)
Zenith Electronics 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.