Granted Patent
Utility
US 4,462,095 · App. 06/359,641
Moving diffraction grating for an information track centering system for optical recording
Inventor:
Di Chen
Patented Case
View Patent ↗
Granted: Jul 24, 1984
Filed: Mar 19, 1982
Inventor
Di Chen
Assignee (at issue)
Magnetic Peripherals, Inc.
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.