Last patent granted 8 years ago. Last application 3 years ago. All this progress and no patent updates. Either George has decided the application is so hard no one else can copy it or he's given up on feeding this cow and is content to just milk it. (Another form of dilution) Of course, it could be we don't know what we don't know or who's not doing it. Patents could be filed under another name. Somehow I have trouble picturing George doing anything that he doesn't have complete control of or having his name all over it. It's your money, you decide.