Granted Patent
Utility
US 4,492,776 · App. 06/599,739
Hydrogel contact lenses for permanent wear
Inventors:
Ivor B. Atkinson, Barry C. Holdstock
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Apr 12, 1984
Inventors
Ivor B. Atkinson
Barry C. Holdstock
Assignee (at issue)
Coopervision, 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.