You will find the patent info in PanAmerican Seed. Clear Crystal Lavender Shades PAS501338, Purple Shades PAS501342, White PAS501344
Most Ball Seed plant varieties are a PanAmerican Patent. See if you can get a catalogue from your Ball Hort area rep. I have a 2012 and expect my 2013 catalogue next week. The web site sometimes doesn't have the patent No on it, but the printed catalogue does
Hope it helps