Patent Infringement in the Philippines: Who Can Sue and Why a Patent Matters

The Supreme Court's 1998 decision in Creser Precision Systems, Inc. v. Court of Appeals and Floro International Corp. (G.R. No. 118708) provides a clear and important lesson for inventors and businesses in the Philippines: having a great idea—or even being the first to invent something—does not give you the right to sue someone else for patent infringement. Only a granted patent, or a formal right derived from one, can support such a lawsuit.

The case clarifies a common misunderstanding about who may bring an infringement action under the Philippine Patent Law (R.A. 165) and underscores the critical importance of securing a patent to protect an invention.

The Dispute Over the Aerial Fuze

The case involved two companies: Floro International Corp., which held Letters Patent No. UM-6938 for an aerial fuze, and Creser Precision Systems, Inc., which claimed to have developed a nearly identical fuze years earlier.

In 1993, Floro learned that Creser was submitting samples of its own fuze to the Armed Forces of the Philippines for testing and planned to bid on manufacturing it commercially. Floro sent Creser a warning letter about its existing patent. Instead of backing down, Creser filed a complaint for injunction and damages against Floro, arguing that Creser—not Floro—was the "first, true and actual inventor" of the fuze.

The trial court initially sided with Creser, issuing a preliminary injunction that barred Floro from manufacturing or selling its patented fuze. The Court of Appeals reversed this ruling, and the case reached the Supreme Court.

The Legal Issue: Who Can Sue for Infringement?

The central question was whether Creser, which held no patent over the aerial fuze, could file an infringement suit against Floro, the registered patent holder.

Creser argued that under Section 42 of R.A. 165, anyone possessing "any right, title or interest" in a patented invention could sue for infringement. Creser claimed that as the "first true and actual inventor," it had such a right.

The Supreme Court disagreed. It held that Section 42 must be read strictly: only the patentee or the patentee's successors-in-interest, assignees, or grantees may file an infringement action. The phrase "anyone possessing any right, title or interest" refers specifically to those who have derived their rights from the patent holder—not to an unpatented inventor.

The Ruling: No Patent, No Infringement Suit

The Court was emphatic: there can be no infringement of a patent until a patent has been issued. Whatever rights one has to an invention arise solely from the grant of a patent. A person or company without letters patent, and without any assignment or license from the patent holder, has no cause of action for infringement.

The Court noted that while Creser claimed to be the first inventor, it had no property right over the fuze that could support a lawsuit. Under established principles, an inventor who voluntarily discloses an invention without seeking a patent allows the public to copy and use it freely. A patent is what grants the exclusive right to exclude others from making, using, or selling the invention.

The Court also rejected Creser's argument that it could pursue a declaratory judgment or injunctive suit similar to those recognized under American law. Such remedies are not recognized in the Philippines for this purpose.

The Proper Remedy: Petition for Cancellation

The Court did not leave unpatented inventors without recourse. It pointed to Section 28 of R.A. 165, which allows any person to file a petition for cancellation of a patent with the Director of Patents within three years from the patent's publication, on the ground that the patent holder is not the true and actual inventor.

Creser had failed to file such a petition. As a result, it could not later attack the validity of Floro's patent by claiming to be the true inventor. The Court affirmed the Court of Appeals' ruling that Floro, as the registered patent holder, enjoyed the presumption of validity of its patent and the presumption that it was the legal and factual first inventor.

Practical Takeaways

• A patent is the foundation of an infringement suit. Without a granted patent, an inventor generally cannot sue another party for patent infringement in the Philippines.
• Only patent holders and their successors-in-interest (assignees, grantees, or licensees) have standing to file an infringement action under Section 42 of R.A. 165.
• Being the "first inventor" is not enough to establish property rights in an invention for purposes of a lawsuit. File a patent application promptly.
• If someone else patents an invention you believe you created first, do not file an infringement suit. Instead, file a petition for cancellation with the Bureau of Patents within three years of the patent's publication.
• A registered patent carries a presumption of validity in court. Challenging it requires proper administrative proceedings, not a collateral attack in an infringement case.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.