Granted Patent
Utility
US 4,460,990 · App. 06/339,934
Apparatus for reading an optical record carrier
Inventor:
Willem G. Opheij
Patented Case
View Patent ↗
Granted: Jul 17, 1984
Filed: Jan 18, 1982
Inventor
Willem G. Opheij
Assignee (at issue)
U.S. Philips Corporation
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.