Granted Patent
Utility
US 6,809,995 · App. 09/950,516
Digital focus and tracking servo system
Inventors:
Ron J. Kadlec, Charles R. Watt, Christopher J. Turner, Hans Brandon Wach
Patented Case
View Patent ↗
Granted: Oct 26, 2004
Filed: Sep 10, 2001
Inventors
Ron J. Kadlec
Charles R. Watt
Christopher J. Turner
Hans Brandon Wach
Assignee (at issue)
DPHI Acquisitions, 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.