Granted Patent
Utility
US 5,405,557 · App. 08/049,798
Method of making a moulded photochromic lens
Inventor:
Jeffrey M. Kingsbury
Patented Case
View Patent ↗
Granted: Apr 11, 1995
Filed: Apr 21, 1993
Inventor
Jeffrey M. Kingsbury
Assignee (at issue)
Sola Group Ltd.
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.