This is Happs
http://happs.com/This is Happ Controls
http://www.happcontrols.com/See the big red letters at the top left of the page. HAPP.
Possibly Happ's indicating that Happ has posession or ownership of.
Maybe even Happs, indicating more than one of, as though I were referring to the manny Happ distribution centers across the United States, each as a Happ. Example, "At all of the Happs I've been at, only one had buttons that were pink with purple polka dots." ....but this one is a real stretch.
So really, go with Happ.
Now allow me to apologise. Pointless rant. Possibly unfair to someone new to the hobby.