A mark shall be understood to be any sign that serves to differentiate on the market the goods and services of one person from those of another person. Signs that are perceptible, sufficiently distinctive and susceptible of graphic representation may be registered, including the following:

(a) real or invented words or combinations of words, including those that serve to identify persons;
(b) images, figures, symbols, graphs, logotypes and sounds;
(c) letters, numbers, combinations of colors;
(d) three-dimensional shapes, including packaging, containers, the distinctive shape of the product or its presentation;
(e) any combination of the signs or means that are listed non-exhaustively in the foregoing subparagraphs.