Granted Patent
Utility
US 5,018,849 · App. 07/272,113
Colored contact lens and methods of making the same
Inventors:
Kai C. Su, Jeanne S. Stevens-Crowe
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Nov 16, 1988
Inventors
Kai C. Su
Jeanne S. Stevens-Crowe
Assignee (at issue)
Ciba-Geigy
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.