Granted Patent
Utility
US 6,429,930 · App. 09/946,104
Determination of center of focus by diffraction signature analysis
Inventors:
Michael Littau, Christopher J. Raymond
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Sep 4, 2001
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.