Patent Infringement: Types, Penalties, and How to Avoid

Patent infringement occurs when someone makes, uses, sells, or imports a patented product or process without the patent holder's permission. Under the Patents Act, 1970, a patent grants the holder exclusive rights for 20 years from the filing date. Any unauthorised activity that falls within the scope of the patent claims constitutes infringement.

The key provision is Section 48 of the Patents Act, which defines the exclusive rights of a patentee. For a product patent, the patentee has the right to prevent third parties from making, using, offering for sale, selling, or importing the product. For a process patent, the patentee can prevent others from using the process and from offering for sale, selling, or importing products directly obtained through that process.

Infringement is determined by comparing the allegedly infringing product or process with the patent claims. If every element of a claim is present in the accused product or process, it is likely infringing. The burden of proof in civil infringement suits lies with the patentee to establish infringement.

Patent infringement is broadly classified into direct infringement and indirect infringement. Direct infringement occurs when someone performs the prohibited acts themselves. Indirect infringement includes contributory infringement and inducement to infringe, though Indian law does not have a separate statutory provision for these categories as explicitly as US law.

Direct infringement can be literal infringement, where the accused product or process falls exactly within the language of the patent claims. Alternatively, it can be infringement under the doctrine of equivalents, where the accused product performs substantially the same function in substantially the same way to achieve substantially the same result. Indian courts have recognised the doctrine of equivalents in cases like F. Hoffmann-La Roche Ltd. v. Cipla Ltd., though its application is fact-specific.

Another distinction is between primary infringement (directly by the defendant) and secondary infringement (where a person facilitates or contributes to infringement by another). Secondary infringement typically requires knowledge of the patent's existence. Additionally, infringement can be wilful (intentional) or innocent (without knowledge), which affects the quantum of damages.

The consequences of patent infringement in India are primarily civil remedies, though criminal penalties exist in limited circumstances. Under Section 108 of the Patents Act, a court may grant an injunction to prevent further infringement, either interim (temporary) or permanent. Injunctions are the most common remedy sought by patentees.

Damages or an account of profits are also available under Section 108. Damages compensate the patentee for losses suffered due to infringement, while an account of profits requires the infringer to surrender the profits earned from the infringing activity. The patentee can choose either remedy but not both. In Bajaj Auto Ltd. v. TVS Motor Company Ltd., the court emphasised that damages must be proven with evidence.

Criminal penalties are rare but exist under Section 118 of the Patents Act, which penalises the falsification of entries in the patent register. However, criminal liability for infringement itself is not directly provided for in the Act. The court may also order the seizure, forfeiture, or destruction of infringing goods. Additionally, the successful party may be awarded costs of the litigation.

The most effective way to avoid patent infringement is to conduct a thorough patent search before launching a new product or process. A freedom-to-operate (FTO) analysis involves searching existing patents in the relevant jurisdiction to identify any that may cover your intended activities. This search should be conducted by a qualified patent attorney or agent.

If a potentially blocking patent is identified, several options exist. You may design around the patent by modifying your product or process so that it does not fall within the scope of the patent claims. Alternatively, you can seek a licence from the patent holder, which may involve paying royalties. In some cases, the patent may be invalid, and you can challenge its validity before the Patent Office or in court.

Maintaining proper documentation of your product development process is crucial. This includes records of independent creation, prior art searches, and design decisions. Such documentation can help establish that any infringement was innocent or that you had a good faith belief that your product did not infringe. Additionally, monitoring competitor patent filings and staying informed about changes in patent law can help you anticipate and avoid infringement risks.

If you receive a notice alleging patent infringement, do not ignore it. The first step is to carefully review the notice and the patent it references. Identify the patent number, the claims alleged to be infringed, and the specific products or activities accused. Engage a qualified patent attorney immediately to assess the validity of the claim and your potential exposure.

Your attorney will conduct an infringement analysis to determine whether your product or process actually falls within the scope of the patent claims. If infringement is likely, your attorney will explore options such as negotiating a settlement, seeking a licence, or designing around the patent. If the patent appears invalid, your attorney may advise challenging its validity.

Simultaneously, preserve all relevant documents, including design records, prior art searches, and correspondence. Do not destroy or alter any documents that may be relevant to the dispute. Your attorney will also advise on whether to cease the allegedly infringing activity immediately or continue while the dispute is resolved. In some cases, a cease-and-desist letter may be the precursor to litigation, so prompt legal advice is essential.

If you are facing a patent infringement allegation or want to ensure your product does not infringe existing patents, consult a qualified patent attorney. They can conduct a freedom-to-operate analysis, assess your risk, and guide you through licensing or litigation options. Do not attempt to handle patent matters without professional legal advice.

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This page provides preliminary information. It is not legal advice. For your matter, consult a qualified professional.