In Mexico during the protectionist economic regime a process of industrial modernization was carried out which led to the incorporation of different types of technologies into the structures and processes of production or consumption. The patent policy was implemented with the interest of encouraging the attraction of novel technologies, but their contribution was quite limited due to the nature, design and operation, with which it was conformed. Therefore, the patent policy did not drive patenting activity in a high and sustained manner. It was ineffective to contribute to the development of technologies generated by local actors, and marginally propitiated the productive exploitation of patents.