Limitations

Nature of Patent Limitations

A patent gives the owner a time-limited right to exclude others from exploiting the patented invention, but that exclusivity is not absolute. Patent limitations mark the situations where a third person may perform acts that would otherwise fall within the patentee's exclusive rights without committing infringement.

The limitations qualify the patentee's power to stop the making, using, offering for sale, selling, or importing of a patented product, and the use of a patented process or dealing in a product directly obtained from that process. They do not cancel the patent; they merely remove particular acts from the reach of the patent monopoly.

The main statutory limitations are the specific exceptions in Section 72 of the Intellectual Property Code, the prior user right, and government use of the invention. They reflect the balance between reward for invention and the public interest in commerce, medicine, education, research, emergency response, and fair competition.

Exhaustion After Authorized Marketing

The patentee cannot use the patent to prevent the use of a patented product that has already been put on the Philippine market by the patentee or with the patentee's express consent. This is the exhaustion rule: once the patent owner has authorized the first commercial release of the particular product, patent control over that particular article is exhausted.

Exhaustion applies only to the genuine article that entered commerce through the patent owner or an authorized source. It does not authorize a third person to manufacture new copies, reconstruct the patented invention, sell counterfeit goods, or deal in products introduced outside the scope of the authorization.

For drugs and medicines, the Cheaper Medicines Act broadened exhaustion. The limitation applies after the drug or medicine has been introduced in the Philippines or anywhere else in the world by the patent owner or by a party authorized to use the invention.

This special rule permits parallel importation of genuine drugs and medicines by any government agency or private third party once the product has been lawfully introduced by the patent owner or an authorized party in any market. The object is to prevent the patent from being used to block access to lower-priced genuine medicines after the patentee has already placed the product in commerce.

Exhaustion is product-specific. The lawful marketing of one batch does not authorize the manufacture of another batch, and the lawful marketing of a patented product does not necessarily license unrelated patented processes, components, or improvements not embodied in the product sold.

Private and Non-Commercial Acts

The patentee has no right to prevent an act done privately and on a non-commercial scale or for a non-commercial purpose, provided the act does not significantly prejudice the economic interests of the patent owner. The exception protects conduct that is outside the ordinary market for the patented invention.

The act must be private in character. Public distribution, business use, organized supply to others, or use in a revenue-generating enterprise ordinarily loses the private character needed for the limitation.

The act must also be non-commercial in scale or purpose. A purely personal, household, charitable, educational, or other non-market use may fall within the limitation, but repeated production, customer-facing use, or preparatory manufacture for commercial sale may significantly prejudice the patentee's economic interests.

The limitation is not a general small-scale infringement defense. Even a limited act may fall outside the exception when it substitutes for demand in the relevant market, deprives the patentee of licensing revenue, or becomes part of a commercial plan.

Experimental and Educational Use

The patentee cannot prevent making or using the invention exclusively for experimental use of the invention for scientific or educational purposes, including activities directly related to that experimental use. The protected act is inquiry, testing, verification, teaching, or investigation concerning the patented invention.

The exception covers experimentation on the invention, such as testing its properties, checking whether it works as claimed, studying its limitations, developing improvements, or using it in a controlled educational demonstration. It recognizes that patent disclosure is intended to enrich technical knowledge, not to suppress learning.

The word exclusively is important. The exception ends where experimentation becomes commercial exploitation, such as routine production, sale of outputs, customer service using the patented invention as a business tool, or quality-control testing that is merely part of a commercial manufacturing process.

Experimental use is distinct from a license to compete. A researcher may study the invention, but may not rely on the exception to place infringing products in the market or to perform commercial services that appropriate the economic value of the patented technology.

Regulatory Testing for Drugs and Medicines

For drugs and medicines, the law separately protects acts done solely for purposes reasonably related to developing and submitting information, and obtaining regulatory approvals, from government agencies in the Philippines or in another country. This is commonly understood as the regulatory review or Bolar-type exception.

The covered acts include testing, using, making, or selling the invention, including data related to it, when the sole purpose is to secure the required approval for the manufacture, construction, use, or sale of the regulated product. The rule allows a potential market entrant, especially a generic manufacturer, to complete regulatory preparations before lawful commercial entry.

The exception prevents the patent term from being effectively extended by regulatory delay. Without it, a competitor could begin approval testing only after patent expiry, leaving the patentee with a practical post-expiry exclusivity period while the competitor waits for regulatory clearance.

The limitation does not permit commercial launch before the patent ceases to block the product or before another lawful basis exists. It also does not authorize stockpiling beyond what is reasonably tied to regulatory work, ordinary commercial sales disguised as testing, or unfair commercial use of protected regulatory data.

Individual Pharmacy Preparation

The patent owner cannot prevent the preparation, for individual cases, of a medicine in a pharmacy or by a medical professional in accordance with a medical prescription, including acts concerning the medicine so prepared. The limitation is narrow and patient-specific.

The exception covers extemporaneous preparation for a particular patient under a particular prescription. It accommodates medical judgment and individualized treatment where the medicine is prepared for a specific case rather than manufactured for the general market.

The limitation does not cover mass production, inventory manufacture, promotional distribution, wholesale supply, or repeated compounding used as a substitute for commercial manufacture. A pharmacy or medical professional cannot convert the exception into an unlicensed business of supplying patented medicines to the public.

Temporary Presence of Foreign Conveyances

The patent owner cannot prevent use of the invention in a ship, vessel, aircraft, or land vehicle of another country that enters Philippine territory temporarily or accidentally, if the invention is used exclusively for the needs of that conveyance. The rule protects international traffic from being disrupted by local patent claims during temporary entry.

The invention may be part of the engine, navigation system, communication equipment, cargo-handling mechanism, or another apparatus necessary for the foreign conveyance. The controlling point is that the patented invention is used for the needs of the conveyance itself.

The exception does not allow manufacture of articles for sale in the Philippines, production for export, or exploitation unrelated to the temporary or accidental presence of the foreign conveyance. A foreign aircraft may use its patented onboard mechanism while in the Philippines, but it may not operate as a local manufacturing platform for patented goods.

Prior User Right

A person who, in good faith, was already using the invention or had undertaken serious preparations to use it in the person's enterprise or business before the filing date or priority date of the patent may continue that use. This is the prior user limitation.

The right is based on fairness to a person who independently acted before the patentee obtained the benefit of filing. It protects existing use or serious preparations, but it does not defeat the patent as against the rest of the public.

Good faith is essential. A person who derived the invention from the applicant through breach of confidence, fraud, or other improper means cannot invoke prior use as a shield.

The use must be tied to the enterprise or business in which the prior use or preparations occurred. The prior user may continue the use as previously made or as seriously prepared, but may not expand it into a general license to exploit the invention beyond the protected undertaking.

The prior user right is transferable only with the enterprise or business, or the part of the enterprise or business, in which the use or preparations were made. This prevents the right from being traded as an independent license detached from the activity that justified it.

Government Use

A government agency, or a third person authorized by the Government, may exploit a patented invention without the patent owner's agreement in defined situations. Government use is not an ordinary private defense; it depends on governmental authority and statutory grounds.

Government use is allowed where public interest requires it, particularly in matters involving national security, nutrition, health, or the development of vital sectors of the national economy. It is also allowed where a competent judicial or administrative body has determined that the patentee or licensee has exploited the patent in an anti-competitive manner.

For drugs and medicines, public health considerations are especially important. Government action may be justified by national emergency, circumstances of extreme urgency, public non-commercial use, or inadequate availability of patented medicines on reasonable terms as determined by the proper health authority.

The authorization should be limited to the purpose that justified government use. It is not a forfeiture of the patent, and it does not transfer ownership of the invention to the Government or to the authorized third person.

The patentee remains entitled to remuneration under the conditions governing non-voluntary exploitation of patents. The amount and terms should reflect the economic value of the authorization, subject to adjustments where the ground involves anti-competitive conduct or urgent public need.

Compulsory Licensing as a Related Limitation

Compulsory licensing is a related but distinct limitation on patent exclusivity. Unlike the self-executing exceptions in Section 72, a compulsory license requires an official grant that authorizes a person to exploit the patented invention without the owner's consent.

The grounds generally involve public interest, national emergency or extreme urgency, anti-competitive exploitation, public non-commercial use, inadequate working of the invention where legally relevant, and dependent inventions that cannot be worked without using an earlier patent. The license is ordinarily non-exclusive, limited in scope and duration, and subject to payment of adequate remuneration.

A compulsory license does not erase infringement liability for acts committed before the license or outside its terms. The licensee must remain within the authorized purpose, territory, quantity, period, and conditions stated in the grant.

Effect of a Valid Limitation

When a limitation applies, the patent owner has no right to prevent the covered act and cannot recover infringement remedies for that act. The limitation operates as a boundary of the exclusive right, not as an excuse for unlawful conduct outside the boundary.

The person invoking the limitation must show the facts that bring the act within the exception. The same conduct may be partly protected and partly infringing if some acts fall within the limitation while other acts exceed it.

Patent limitations do not usually affect obligations arising from other laws. A person may avoid patent infringement yet still need regulatory approval, comply with food and drug rules, respect confidential information, obey competition law, or answer for breach of contract.

Comparative Effect of the Main Limitations