Granted Patent
Utility
US 6,540,354 · App. 09/389,762
Multifocal ophthalmic lens
Inventors:
Jean-Pierre Chauveau, Bernard Bourdoncle, Sandrine Francois
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Sep 2, 1999
Inventors
Jean-Pierre Chauveau
Bernard Bourdoncle
Sandrine Francois
Assignee (at issue)
Essilor International
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.