Granted Patent
Utility
US 4,621,294 · App. 06/595,085
Contrast enhancing optical coupling pad for projection TV
Inventor:
Sae D. Lee
Patented Case
View Patent ↗
Granted: Nov 4, 1986
Filed: Mar 30, 1984
Inventor
Sae D. Lee
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.