Idea of Registered Trademark Icon
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 Registered Trademark icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,200 icons, all in the same style and quality.