Granted Patent
Utility
US 6,187,844 · App. 09/247,600
Plastic lens
Inventor:
Naoki Murata
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Feb 10, 1999
Inventor
Naoki Murata
Assignee (at issue)
Asahi Kogaku Kogyo Kabushiki Kaisha
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.