Granted Patent
Utility
US 4,688,201 · App. 06/692,278
Focusing and tracking apparatus for an optical data storage device
Inventors:
David K. Towner, David K. Campbell
Patented Case
View Patent ↗
Granted: Aug 18, 1987
Filed: Jan 16, 1985
Inventors
David K. Towner
David K. Campbell
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.