Aguas vs. De Leon

G.R. No. L-32160
De Leon's patent for tile-making improvements upheld; Aguas found to infringe by using identical moulds, damages awarded but moral damages reduced.
patent misrepresentation infringement

Case Summary (G.R. No. L-32160)

Factual Background

On December 1, 1959, CONRADO G. DE LEON filed a patent application for what he described as a "new and useful improvement in the process of making mosaic pre-cast tiles." The Philippine Patent Office issued Letters Patent No. 658 on May 5, 1960. On April 14, 1962, de Leon filed a complaint for patent infringement against DOMICIANO A. AGUAS and F.H. Aquino & Sons, alleging that Aguas made, used and sold tiles embodying the patented improvement and that Aquino supplied engravings, castings and devices used in making such tiles. De Leon alleged compliance with marking statutes, commercial success, notice to defendants, and sought injunctive relief, actual, moral and exemplary damages, and attorney’s fees.

Trial Court Proceedings and Judgment

The trial court granted a Writ of Preliminary Injunction on April 14, 1962. After trial, the Court of First Instance of Rizal at Quezon City rendered judgment on December 29, 1965, declaring the patent valid and infringed. The court issued a perpetual injunction against the defendants, ordered delivery of infringing articles in their possession, and awarded damages and costs: actual damages P10,020.99; moral damages P50,000.00; exemplary damages P5,000.00; attorney’s fees P5,000.00; and costs of suit.

Appeal to the Court of Appeals

DOMICIANO A. AGUAS appealed to the Court of Appeals, assigning errors that challenged the patent’s validity, urged cancellation of Letters Patent No. 658, denied the existence of infringement on factual and technical grounds, and contested the award of damages and attorney’s fees. The other defendant, F.H. Aquino & Sons, did not appeal. On August 5, 1969, the Court of Appeals affirmed the trial court’s decision but modified the award of moral damages, reducing it from P50,000.00 to P3,000.00.

Findings of Fact by the Court of Appeals

The Court of Appeals found as facts that de Leon filed his application December 1, 1959, and obtained Letters Patent No. 658 on May 5, 1960; that F.H. Aquino & Sons engraved moulds embodying the patented improvement after receiving models and specifications from de Leon; that Aguas had purchased de Leon’s tiles and later asked Aquino to make substantially identical engravings; that Aquino knew the moulds for Aguas would produce tiles similar to de Leon’s; and that the tiles produced by de Leon and by Aguas were substantially identical in size, easement, lip width and critical depth, the only significant difference being a size variation of 4 x 4 inches versus 4-1/4 x 4-1/4 inches.

Legal Issue Presented

The principal legal issues were whether the improvement claimed in Letters Patent No. 658 was patentable — novel, useful and inventive or merely an old, non-patentable process — and whether Aguas infringed that patent; a secondary issue was the proper measure and amount of damages to be awarded for the infringement.

Standard of Review and Presumption of Validity

The Court of Appeals applied the presumption that the Philippine Patent Office correctly determined the patentability of the improvement when it issued Letters Patent No. 658, and held that the appellant had not adduced sufficient evidence to overcome that presumption. The appellate court recognized the technical competence of the Patent Office staff and treated the issuance of the patent as bolstering the presumption of validity. The Supreme Court likewise deferred to the Court of Appeals’ factual findings absent exceptional circumstances.

Court of Appeals’ Analysis on Patentability

Invoking Section 7 of Republic Act No. 165, the Court of Appeals found that de Leon introduced an improvement in tile-making that went beyond mere mechanical skill. The court identified novel features: a new critical depth with corresponding easement and lip width that allowed tiles as thin as one-eighth of an inch at the deepest portion while retaining sufficient strength; an ideal composition of cement, sodium silicate and screened fine sand; and the engraving technique that produced decorative, mass-producible, and durable wall tiles. The court noted the absence of proof that identical tiles had been produced by others prior to de Leon’s manufacture and regarded de Leon’s commercial success as evidence supportive of patentability.

Findings on Infringement

Both the trial court and the Court of Appeals found that Aguas infringed de Leon’s patent. The factual basis included testimony and exhibits showing that Aguas procured moulds engraved with the characteristic features of de Leon’s patent, that Aquino knew the moulds for Aguas duplicated the patented features, and that Aguas used those moulds to manufacture and sell tiles to the public. The courts concluded that the accused tiles embodied the patented improvement in size, easement, lip width and critical depth.

Damages Award and Rationale

The trial court’s award of damages rested on an accounting and on statutory and equitable considerations. An examination of Aguas’s books before a commissioner showed gross income of P3,340.33 during the infringing period, which the trial court treated as the concrete enrichment from infringement. Citing Section 42 of the Patent Law, the trial court awarded actual damages P10,020.99, explaining that damages may be in a sum above the amount found as actual damages but not exceeding three times that amount. The court awarded exemplary damages of P5,000.00 to discourage willful infringement and to strengthen protection for inventors, and moral damages of P50,000.00 on the ground that the plaintiff suffered mental anguish and that his reputation had been put in question by defendants’ acts. Attorney’s fees of P5,000.00 and costs were also awarded.

Modification of M

...continue reading