So, unless I missed it, that thread doesn't address the question as to whether or not Circle K's trademark is a K in a circle. It seems obvious that that would be the case, but since no one who knows confirmed it, my last post was an attempt to make that small leap for the OP, but also to point out that I don't know that to be 100% confirmed. I've never seen it discussed, and I've done a LOT of searching this forum in the last nine months...