Infringement

Nature of Patent Infringement

Patent infringement is the unauthorized exercise of the exclusive rights conferred by a valid and subsisting Philippine patent. The wrong lies in appropriating the patented invention within Philippine territory, not in copying the patentee's label, business name, or commercial get-up.

A patent protects the invention as defined by its claims. The specification and drawings explain the claims, but they do not replace them. Infringement analysis therefore begins with the claims, identifies each material element of the claimed invention, and compares those elements with the accused product, process, or act.

Patent infringement is territorial. A Philippine patent is infringed by acts done in the Philippines, including unauthorized importation, offering for sale, sale, use, or dealing in a product covered by the patent. Manufacture abroad may become actionable in the Philippines when the patented product, or a product obtained from a patented process, is imported, offered, sold, or used here without authority.

Acts Constituting Infringement

The IP Code treats infringement according to the kind of patent right involved. The protected acts are commercial and technical acts over the patented invention, and liability does not depend on whether the infringer used the patentee's exact machines, factory methods, or trade channels.

Infringement may exist even without local manufacture. Importation is independently covered because the economic value of a patent would be impaired if an unauthorized person could manufacture abroad and bring the patented product into the Philippine market.

Intent, bad faith, or knowledge is not an element of the infringing act for purposes of civil infringement. They matter mainly in the assessment of damages, notice, enhanced recovery, and related consequences.

Requisites of a Civil Infringement Action

A civil action for patent infringement generally requires a valid and enforceable patent, ownership or a sufficient legal interest in the patented invention, an unauthorized act within the scope of the patent claims, and damage or threatened damage to the right holder.

• Valid patent. The patent must be existing, unexpired, and not cancelled as to the claim invoked. A patent is presumed valid upon grant, but the presumption may be overcome in the infringement case itself.
• Standing to sue. The patentee, assignee, or a person possessing a right, title, or interest in the patented invention may sue to the extent that the person's rights have been infringed.
• Unauthorized act. The defendant must have made, used, offered for sale, sold, imported, or otherwise dealt with the patented invention in a manner reserved to the patent owner.
• Claim coverage. The accused product or process must fall within at least one asserted claim, either literally or by legally recognized equivalents.
• Territorial connection. The actionable act must have a Philippine connection, because patent rights are national rights granted by Philippine law.

The plaintiff bears the burden of proving infringement by competent evidence. Technical identity is commonly established through claim charts, expert testimony, product inspection, process evidence, admissions, documents, samples, and market conduct.

Claim-Based Comparison

The claims mark the legal boundary of the patent monopoly. Matter described in the specification but not claimed is generally not protected as a patent claim, although it may help interpret ambiguous claim language.

Literal infringement exists when every material element of a claim is found in the accused product or process. If even one essential claim element is absent, literal infringement fails, although infringement by equivalents may still be considered if the missing literal element is replaced by an insubstantial equivalent.

The doctrine of equivalents prevents evasion by colorable changes. An accused device or process may infringe when it performs substantially the same function, in substantially the same way, to obtain substantially the same result as the claimed invention. The doctrine protects substance over form, but it cannot be used to erase claim limitations, cover prior art, or recapture matter that the applicant gave up to obtain the patent.

In applying equivalence, courts distinguish between an immaterial variation and a different invention. A change in size, form, material, sequence, or mechanical arrangement may be immaterial if the claimed inventive principle remains appropriated. A change is material when it changes the operative principle, avoids an essential limitation, or produces the result through a substantially different means.

Additional features do not avoid infringement if all elements of the patented claim are present. An infringing product may be an improved product, a more efficient product, or a product with extra components, because infringement asks whether the patented combination was taken, not whether the defendant added something else.

Direct, Induced, and Contributory Infringement

Direct infringement is committed by the person who personally performs an unauthorized act within the patent owner's exclusive rights. A manufacturer, importer, seller, user, or distributor may be a direct infringer when the accused act falls within the patent claims.

Induced infringement arises when a person actively induces another to infringe. Liability rests on purposeful participation, such as directing, instructing, encouraging, or arranging conduct that results in infringement of the patent.

Contributory infringement arises when a person supplies a component of a patented product, or a component for use in a patented process, knowing that it is especially adapted for infringement and is not suitable for substantial non-infringing use. The rule targets assistance that has no meaningful lawful commercial purpose apart from infringement.

A supplier of staple articles of commerce is not automatically a contributory infringer. If the item has substantial lawful uses, liability requires more than ordinary sale; there must be conduct connecting the supplier to the infringing use, such as active inducement or knowing participation in a specific infringing scheme.

Contributory infringers are answerable with the direct infringer because the law treats deliberate facilitation of infringement as an invasion of the patent right. The liability is not based on ownership of the final product but on knowing and material participation in the prohibited exploitation of the invention.

Process Patents and Identical Products

Process patents create evidentiary difficulty because the patented method may be performed inside the defendant's plant, abroad, or behind confidential manufacturing arrangements. The IP Code addresses this by recognizing presumptions in actions involving products allegedly obtained through a patented process.

When the patent covers a process for obtaining a product, an identical product may be presumed to have been obtained by the patented process if the product is new, or if there is a substantial likelihood that the identical product was made by the patented process and the patentee cannot determine the actual process despite reasonable efforts.

Once the presumption applies, the defendant must prove that a different process was used. In receiving such proof, the court must balance the patentee's right to effective enforcement with the defendant's legitimate interest in protecting manufacturing and business secrets.

The presumption does not convert every similarity into infringement. It applies to identical products under the conditions set by law, and the defendant may defeat liability by showing a non-infringing process that independently produced the product.

Persons Who May Sue or Be Sued

The patentee may sue because the patent grant vests the exclusive right to exploit the invention. An assignee may sue when ownership has been transferred. A licensee may sue only if the license or the law gives that licensee a sufficient right, title, or interest affected by the infringement.

An exclusive licensee is more likely to have a protectable interest because infringement invades the exclusivity granted by the license. A non-exclusive licensee ordinarily suffers a contractual or commercial injury but does not automatically own the patent right itself.

A foreign patent owner may enforce rights in the Philippines when entitled under Philippine law, treaty obligations, or reciprocity. The suit still concerns the Philippine patent or Philippine enforceable right, not the foreign patent as such.

Defendants may include manufacturers, importers, sellers, distributors, users, corporate entities, responsible participants, inducement actors, and contributory infringers. Corporate personality does not shield a person who personally participates in infringing acts, although liability must still be established by evidence.

Acts Not Treated as Infringement

Patent rights are exclusive but limited. The law preserves certain acts because they do not materially appropriate the patent monopoly, because they serve public policy, or because the patentee's control over the specific article has been exhausted.

Exhaustion and Parallel Importation

After a patented product has been placed on the market by the patent owner or with the owner's consent, the patent owner's control over that particular article is generally exhausted as to acts permitted by law. The buyer may use or resell that specific article, but exhaustion does not authorize making new copies of the patented product.

For drugs and medicines, the cheaper medicines amendments broaden the exhaustion rule by allowing importation after the drug or medicine has been introduced in the Philippines or anywhere else in the world by the patent owner or an authorized party. This permits lawful parallel importation of covered medicines, subject to regulatory requirements and the limits of the statutory rule.

Private, Non-Commercial, Experimental, and Educational Acts

Acts done privately and on a non-commercial scale, or for a non-commercial purpose, are outside the patent owner's enforceable control when they do not significantly prejudice the patent owner's economic interests. The exception is narrow because commercial exploitation cannot be disguised as private use.

Making or using the invention exclusively for experimental, scientific, or educational purposes is not infringement when the activity is directed to learning about, testing, or studying the invention. The exception does not cover commercial production under the appearance of research.

The regulatory-use or Bolar-type exception allows acts reasonably related to the development and submission of information required for government approval of drugs and medicines. Its purpose is to allow market entry after patent expiry without treating pre-expiry regulatory preparation as infringement.

Pharmacy Preparation and Temporary Presence

The preparation of a medicine for individual cases in a pharmacy, in accordance with a medical prescription, is treated differently from commercial manufacture. The exception is limited to individualized preparation and does not authorize mass production or general sale.

Use of a patented invention in a foreign vessel, aircraft, or land vehicle that temporarily or accidentally enters Philippine territory is not infringement when the invention is used exclusively for the needs of that vehicle and reciprocity requirements are satisfied. The rule protects international movement without surrendering the domestic market to unauthorized commerce.

Prior User, Government Use, and Compulsory License

A prior user who, in good faith, used the invention or made serious preparations to use it in the Philippines before the filing or priority date may continue that use within the existing enterprise. The right is personal to the enterprise and does not become a general license to expand beyond the protected prior use.

Government use and compulsory licensing may authorize exploitation of a patented invention without the patent owner's consent when statutory grounds and procedures are satisfied. Once the use is legally authorized, the remedy is usually compensation under the authorization, not an infringement action against the authorized use.

Defenses in an Infringement Action

The defendant may deny infringement, attack the plaintiff's right to sue, invoke statutory limitations, or challenge the validity of the asserted patent or claim. Patent validity may be raised as a defense and, when appropriate, as a basis for cancellation.

Invalidity is especially important because infringement cannot arise from an invalid claim. If the court finds that the asserted claim should not have been granted, enforcement fails as to that claim, and cancellation consequences follow through the proper patent records.

A license defense depends on scope. Acts within a valid license are authorized; acts outside the licensed field, territory, term, product line, quantity, or permitted use may still infringe if the limitation defines the patent permission rather than a merely collateral contractual covenant.

Notice, Limitation, and Damages

Damages are not automatically recoverable for every infringing act from the date of patent grant. The IP Code limits recovery for damages where the infringer did not know, and had no reasonable grounds to know, that the patent existed. Marking the patented article or its container with the words indicating a Philippine patent and the patent number supplies strong notice.

No damages may be recovered for infringing acts committed more than four years before the institution of the action. This limitation affects monetary recovery, not necessarily the availability of prospective injunctive relief for continuing infringement.

Recoverable damages may include the patentee's actual loss, the infringer's gain when properly connected to the infringement, price erosion, lost profits, or other proven economic injury. If actual damages cannot be determined with reasonable certainty, the court may award a reasonable royalty as the measure of compensation.

The court may increase damages in appropriate cases, but enhanced damages are discretionary and must remain tied to the circumstances of the infringement. Bad faith, deliberate copying, continued infringement after notice, concealment, and scale of commercial exploitation may affect the court's assessment.

Attorney's fees and litigation costs may be awarded when justified by the statute and the facts. Technical litigation expense alone does not replace proof of the infringing act and the economic basis for recovery.

Injunction and Disposition of Infringing Goods

Injunction is a principal remedy because patent rights are exclusionary. A court may restrain continuing or threatened infringement when the plaintiff establishes a valid patent, probable infringement, and the requisites for equitable relief.

A permanent injunction may issue after adjudication to prevent future unauthorized exploitation of the patented invention. The injunction should be framed according to the claims actually infringed and the acts proven, so that it prevents infringement without prohibiting lawful competition.

The court may order infringing goods, materials, and implements predominantly used to create infringing goods to be removed from commerce or destroyed without compensation. This remedy prevents the infringer from preserving the economic fruits or instrumentalities of infringement.

Destruction or disposal must be connected to infringing goods or tools of infringement. Lawful inventory, staple articles, and materials with substantial non-infringing uses require careful treatment because patent remedies protect the invention, not a general monopoly over ordinary commerce.

Criminal Liability for Repeated Infringement

Patent infringement is primarily enforced through civil remedies, but the IP Code provides criminal liability for repeated infringement after final judgment. The criminal consequence presupposes a prior final adjudication of infringement and a later repetition by the infringer or by another acting in connivance.

The requirement of repetition after finality separates ordinary civil infringement from penal infringement. It gives the infringer clear judicial notice that the conduct has been adjudged unlawful, and it punishes continued defiance of the patent right rather than a first disputed act.

The criminal action is subject to its own prescriptive period counted from the commission of the offense. Civil relief for infringement and penal liability for repeated infringement therefore have different triggers, purposes, and timing.

Effect of Patent Cancellation or Expiry

Patent cancellation eliminates enforceability of the cancelled claim. If only some claims are cancelled, unaffected valid claims may still be enforced if they independently cover the accused product or process.

Patent expiry ends the exclusive right prospectively. After expiry, the invention falls into the public domain, and anyone may practice it, subject to other applicable rights that are legally distinct from the expired patent. Acts committed while the patent was valid may still support timely claims for damages if the requirements for recovery are met.

A later improvement patent does not authorize infringement of an earlier dominant patent. Conversely, ownership of an earlier broad patent does not automatically confer the right to practice a later patented improvement. Each patent must be assessed according to its own claims and term.

Practical Scope of the Patent Monopoly

The patent monopoly is a right to exclude, not a government permit to manufacture, sell, or use the invention free from all other laws. Regulatory approvals, product standards, drug registration, environmental permits, and contractual restrictions may still govern market activity.

Infringement focuses on whether the defendant took the patented technical teaching as claimed. Independent creation is not a defense if the product or process falls within the patent claims, because patent law rewards disclosure with exclusivity rather than merely preventing copying.

At the same time, patent law does not protect abstract ideas, scientific principles, business success, market demand, or unclaimed advantages. Competitors remain free to design around the claims, use public-domain knowledge, practice expired patents, and develop non-equivalent alternatives.