Granted Patent
Utility
US 6,229,771 · App. 09/169,212
Method and apparatus for generating focus error signals in a multi-beam optical disk drive
Inventors:
Tatiana Kosoburd, Amir Alon, Shlomo Shapira, Michael Naor
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Oct 9, 1998
Inventors
Tatiana Kosoburd
Amir Alon
Shlomo Shapira
Michael Naor
Assignee (at issue)
Zen Research (Ireland), Ltd.
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.