Biblioteca del Instituto de Estudios Fiscales

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Schankerman, Mark

How valuable is patent protection? estimates by technology field using patent renewal data .-- Cambridge (Mss.) : NBER , 1991

.--38 p.; gráf. gráf.; 23 cm. .-- ( NBER. Working paper ; 3780 ).


Resumen. -- Conclusiones. -- Bibliografía


PATENTES
FRANCIA

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