Granted Patent
Utility
US 6,606,152 · App. 10/202,429
Determination of center of focus by diffraction signature analysis
Inventors:
Michael Littau, Christopher J. Raymond
Patented Case
View Patent ↗
Granted: Aug 12, 2003
Filed: Jul 23, 2002
Inventors
Michael Littau
Christopher J. Raymond
Assignee (at issue)
Accent Optical Technologies, 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.