Granted Patent
Utility
US 5,804,453 · App. 08/599,298
Fiber optic direct-sensing bioprobe using a phase-tracking approach
Inventor:
Duan-Jun Chen
Patented Case
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Granted: Sep 8, 1998
Filed: Feb 9, 1996
Inventor
Duan-Jun Chen
Assignee (at issue)
Duan-Jun Chen
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.