There Is No Cat – Adventures in The Trademark Zone
Did you know that Clue-by-Four[tm] is a trademarked term?
Apparently, I’m an offender as well, but I had never heard the term used before: it just stemmed from my exasperation at that moment.
Here’s the link to the USPTO details. This guy’s going to a lot of trouble to defend his foam rubber board. There’s a metaphor there that I’m not going to touch . . . .