Granted Patent
Utility
US 4,970,710 · App. 07/410,478
Method and apparatus for focus and tracking in an optical disk system
Inventor:
Wai-Hon Lee
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Sep 21, 1989
Inventor
Wai-Hon Lee
Assignee (at issue)
Laser Magnetic Storage International Company
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.