Granted Patent
Utility
US 6,731,408 · App. 09/441,918
Method for producing a raster surface for use in the coloring of contact lens
Inventors:
Freddie Bensky, Ari Tenhunen
Patented Case
View Patent ↗
Granted: May 4, 2004
Filed: Nov 17, 1999
Inventors
Freddie Bensky
Ari Tenhunen
Assignee (at issue)
CL-TINTERS OY
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.