Republic Acts1 min read
Section 81June 6, 1997, Sec./Art. 81
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Defenses in Action for Infringement. - In an action for infringement, the defendant, in addition to other defenses available to him, may show the invalidity of the patent, or any claim thereof, on any of the grounds on which a petition of cancellation can be brought under Section 61 hereof. (Sec. 45, R.A. No. 165)
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