Granted Patent
Utility
US 5,919,229 · App. 08/885,987
Multifocal opthalmic lens
Inventor:
Valdemar Portney
Patented Case
View Patent ↗
Granted: Jul 6, 1999
Filed: Jun 30, 1997
Inventor
Valdemar Portney
Assignee (at issue)
Allergan, 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.