Granted Patent
Utility
US 5,691,797 · App. 08/588,638
Multifocal contact lens
Inventors:
Leonard Seidner, Maurice Poster
Patented Case
View Patent ↗
Granted: Nov 25, 1997
Filed: Jan 19, 1996
Inventors
Leonard Seidner
Maurice Poster
Assignee (at issue)
Permeable 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.