Granted Patent
Utility
US 5,574,518 · App. 08/370,666
System incorporation two different sphero-non-spherical contact lenses for correcting presbytia
Inventor:
Robert Mercure
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: Jan 10, 1995
Inventor
Robert Mercure
Assignee (at issue)
Les Laboratoires Opti-Centre 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.