Granted Patent
Utility
US 5,771,088 · App. 08/525,779
Contact lens designed to accommodate and correct for the effects of presbyopia
Inventor:
Colin Maurice Perrott
Patented Case
View Patent ↗
Granted: Jun 23, 1998
Filed: Sep 27, 1995
Inventor
Colin Maurice Perrott
Assignee (at issue)
Pilkington Barnes Hind, 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.