Granted Patent
Utility
US 5,805,754 · App. 08/787,801
Graded refractive index optical waveguide using a fluid medium
Inventor:
Yong Zhang
Patented Case
View Patent ↗
Granted: Sep 8, 1998
Filed: Jan 23, 1997
Inventor
Yong Zhang
Assignee (at issue)
Synrad, 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.