Article 4:The following inventions, shall be excluded from patent protection:

1. discoveries, scientific theories and mathematical methods;
2. schemes, rules or methods for doing business, performing purely mental acts or playing games;
3. methods for treatment of the human or animal body by surgery or therapy, as well as diagnostic methods practiced on the human or animal body; this provision shall not apply to products for use in any of those methods;
4. pharmaceutical products as provided in Article 136 of this law;
5. plants and animals other than micro-organisms, and essentially biological processes for the production of plants or animals;
6. Plants varieties.