Granted Patent
Utility
US 5,149,183 · App. 07/588,181
Color enhancing lens
Inventors:
Colin Maurice Perrott, Kenneth John Pidgeon
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: Sep 26, 1990
Inventors
Colin Maurice Perrott
Kenneth John Pidgeon
Assignee (at issue)
Pilkington Visioncare 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.