Article 25 of the Patent Law stipulates: No patent rights shall be granted for the following items: (1) Scientific discoveries; (2) Rules and methods of intellectual activities; (3) Diagnosis and treatment of diseases Methods; (4) Animal and plant varieties; (5) Substances obtained by atomic nuclear transformation; (6) Designs made on the patterns, colors, or a combination of the two on flat printed materials that mainly serve as a mark. Patent rights may be granted in accordance with the provisions of this Law for the production methods of the products listed in item (4) of the preceding paragraph.