Granted Patent
Utility
US 6,222,686 · App. 09/425,855
Gradient index magnifying lens
Inventor:
Fred V. Richard
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Oct 22, 1999
Inventor
Fred V. Richard
Assignee (at issue)
Motorola, 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.