Granted Patent
Utility
US 6,664,538 · App. 09/569,971
Mismatching of gratings to achieve phase shift in an optical position detector
Inventors:
Stephen W. Farnsworth, Kirk Cook
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: May 11, 2000
Inventors
Stephen W. Farnsworth
Kirk Cook
Assignee (at issue)
Infineon Technologies North America Corp.
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.