Granted Patent
Utility
US 5,689,374 · App. 08/400,804
GRIN lens and method of manufacturing
Inventors:
Xiaojie Xu, Michael E. Savard
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: Mar 8, 1995
Inventors
Xiaojie Xu
Michael E. Savard
Assignee (at issue)
LightPath 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.