CASE DIGEST: Frank vs. Benito

PATRICK HENRY FRANK and WILLIAM HENRY GOHN vs. CONSTANCIO BENITO

G.R. No. L-27793, March 15, 1928 

FACTS: Plaintiffs are the owners of a patent covering hemp-stripping machine No. 1519579 issued to them by the United States Patent Office and duly registered in the Bureau of Commerce and Industry of the Philippine Islands under the provisions of Act No. 2235  

Plaintiffs allege that the defendant manufactured a hemp-stripping machine in which, without authority from the plaintiffs, and has embodied and used such spindles and their method of application and use, and is exhibiting his machine to the public for the purpose of inducing its purchase. Frank and Gohn stress that use by the Benito of such spindles and the principle of their application to the stripping of hemp is in violation of, and in conflict with, plaintiffs' patent, together with its conditions and specifications.

Plaintiffs assert the violation of infringement upon the patent granted to Frank & Gohn, and requested that an action for injunction and damages be instituted against Benito.

Respondent on the other hand contends that it had no prior knowledge of the prior existence of the hemp-stripping invention of the plaintiffs nor had any intent to imitate the Frank’s product.  Likewise, the defendant contended that the facts alleged therein do not constitute a cause of action, that it is ambiguous and vague. The lower court rendered judgment in favor of the plaintiffs, to which was later affirmed by the appellate court.

HELD: As a rule, the burden of proof to substantiate a charge of infringement is with the plaintiff. Where, however, the plaintiff introduces the patent in evidence, if it is in due form, it affords a prima facie presumption of its correctness and validity. The decision of the Commissioner of Patents in granting the patent is always presumed to be correct. The burden the shifts to the defendant to overcome by competent evidence this legal presumption.

The patent in the case at bar, having been introduced in evidence, affords a prima facie presumption of its correctness and validity. Hence, this is not a case of a conflict between two different patents. In the recent of Temco Electric Motor Co. vs. Apco Mfg. Co., decided by the Supreme Court of the United States ruled “an improper cannot appropriate the basic patent of another, and if he does so without license is an infringer, and may be used as such. It is well established that an improver cannot appropriate the basic patent of another and that the improver without a license is an infringer and may be sued as such.”