Granted Patent
Utility
US 4,269,487 · App. 06/139,369
Spectacle lens insert for aphakic refraction
Inventor:
John M. Young
Patented Case
View Patent ↗
Granted: May 26, 1981
Filed: Apr 11, 1980
Inventor
John M. Young
Assignee (at issue)
American Optical Corporation
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.