Logo refers to an artistic interpretation of a company's or designer's sign or symbol. These figures can be (mostly) copyrighted or trademarked and permission is needed for duplicatio n.

Designer's logo always appear in all the products they design, like bags, belts, shoes, clothes and must not be faked by other clothing manufacturers so that their products would appear as original. Buyers and lovers of designer's products must be aware of this.
List of books: Logo