Granted Patent
Utility
US 6,040,947 · App. 09/093,991
Variable spectacle lens
Inventors:
Stephen Kurtin, Saul Epstein
Patented Case
View Patent ↗
Granted: Mar 21, 2000
Filed: Jun 9, 1998
Inventors
Stephen Kurtin
Saul Epstein
Assignee (at issue)
Lane Research
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.