Granted Patent
Utility
US 5,691,971 · App. 08/628,328
Multiple recording layer focusing of a light spot with an addition of zoom lens
Inventor:
Jong-ryull Kim
Patented Case
View Patent ↗
Granted: Nov 25, 1997
Filed: Apr 5, 1996
Inventor
Jong-ryull Kim
Assignee (at issue)
SAMSUNG DISPLAY CO., LTD.
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.