Normes
ANEOR: https://www.aenor.com/
ISO: https://www.iso.org/standards.html
Patents
Eurpea patents: https://www.epo.org/index.html
Oficina Española de Patentes y Marcas: https://www.oepm.es/es/index.html
WIPO: https://www.wipo.int/portal/en/index.html
Buscadors:
Espacenet: https://worldwide.espacenet.com/patent/
Lens.org: https://www.lens.org/
Google patents: https://www.google.com/?tbm=pts
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