Granted Patent
Utility
US 4,889,421 · App. 07/252,190
Contact lens with cosmetic pattern
Inventor:
Allen L. Cohen
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Sep 30, 1988
Inventor
Allen L. Cohen
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.