Granted Patent
Utility
US 5,757,459 · App. 08/454,934
Multifocal optical elements
Inventors:
Sujal Bhalakia, Thomas J. Moravec
Patented Case
View Patent ↗
Granted: May 26, 1998
Filed: May 31, 1995
Inventors
Sujal Bhalakia
Thomas J. Moravec
Assignee (at issue)
Vision-Ease Lens
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.