The icon is used to describe registered trademark. The icon is in the shape of a big circle. In the circle, in the very center there is a large, thick letter R. The icon itself is just a little bit bigger than the R.
This is a Registered Trademark icon. It is available in PNG and vector. Downloading is free for PNGs up to 100x100px.
Idea of Registered Trademark Icon by Raynold
We've received the idea on October 28, 2013 and created the icons on September 17, 2014