I have no experience with bricks of cocaine, but for other substances I’ve seen them branded kind of like this.

Pills with Mitsubishi, playboy, or hello kitty logos pressed on the pill itself. LSD sheets with printed pictures, usually not brand logos. Hashish 100g mini-bricks (this are what I’ve seen the most) with anything from logos, cartoons, random drawings, even pictures of famous people (some months ago I got a Ronaldinho, lol).