Patent Infringement Remedies in India: Injunctions, Damages and the Section 108 Framework

Section 108 of the Patents Act, 1970 lays down the remedies available to a patentee in an infringement suit. The provision is short but the practice it generates is voluminous. Indian patent litigation runs on three principal remedies — injunction, damages or account of profits, and delivery up or destruction of infringing goods. Each remedy follows a distinctive procedural and evidentiary track. Each has subsidiary remedies built around it. And together they form the operational toolkit a patentee uses to extract value from a granted patent that is being infringed.

This guide covers the substantive elements of patent infringement, the remedy framework under Section 108, the interim-injunction practice, the damages computation, and the strategic choices that a patentee or accused infringer should make at the litigation-planning stage.

What constitutes patent infringement in India

Section 48 of the Patents Act gives the patentee exclusive rights:

• Where the patent is for a product — the exclusive right to prevent third parties not having the patentee's consent from making, using, offering for sale, selling or importing for those purposes that product in India
• Where the patent is for a process — the exclusive right to prevent third parties from using that process, and from using, offering for sale, selling or importing for those purposes the product obtained directly by that process

An infringement action is built on three findings: (i) a valid patent exists; (ii) the defendant has performed an act within Section 48; and (iii) no exception under Section 49 (Bolar provisions for regulatory approval), Section 107A (parallel imports) or research-use defences applies.

The patent is a right to exclude. Section 108 is the toolkit that enforces it.

The Section 108 remedy menu

Section 108(1) provides that the remedies available in a suit for infringement of a patent include:

• Injunction — interim, ad-interim or permanent, restraining the defendant from continuing the infringing acts
• Damages — compensation for the loss caused by the infringement, OR
• Account of profits — recovery of the profits made by the infringer through the infringement (the plaintiff elects between damages and account of profits)
• Delivery up or destruction — Section 108(2) allows the court to order delivery up or destruction of the infringing goods and the materials used to make them

The choice between damages and account of profits is the plaintiff's to make. Damages compensate the plaintiff for the loss caused — typically calculated through lost sales or hypothetical-licence royalty. Account of profits recovers the defendant's gain — typically more difficult to compute but sometimes more substantial than damages in volume-trade infringements.

Interim and ad-interim injunctions

The interim injunction is the most-sought remedy in Indian patent litigation. The threshold elements established by Order 39 Rules 1 and 2 of the Code of Civil Procedure and decades of patent case law:

1. Prima facie case — the patent appears valid; the defendant's acts appear to infringe
2. Balance of convenience — the harm to the patentee from continued infringement exceeds the harm to the defendant from being enjoined
3. Irreparable injury — damages alone cannot adequately compensate the patentee, often because the harm to market position or licensing leverage is hard to quantify

For pharma matters in particular, Indian courts have refined the balance-of-convenience analysis to weigh public-health concerns. Where a generic's launch would lower drug prices, the court considers public interest alongside private patent rights. The Bayer-Natco framework on compulsory licensing implicitly informs the public-interest assessment.

Damages computation

Indian courts have refined damages computation across several theories:

• Lost-profits theory — the plaintiff's lost sales × the plaintiff's profit margin
• Hypothetical-royalty theory — the royalty a willing licensor and licensee would have agreed on for a licence covering the infringing acts
• Cost-saving theory — the defendant's cost savings from using the patented technology vs available alternatives
• Disgorgement theory — the profits the defendant made through the infringement (Section 108 account of profits)

The choice of theory depends on the facts. Where the patentee was actively commercialising and lost sales to the infringer, lost-profits. Where the patentee was licensing or could have licensed, hypothetical royalty. Where the infringer's gain exceeds the patentee's loss, account of profits. Indian courts increasingly award substantial damages — multi-crore awards have become common in major patent matters since 2018.

Defences and the validity counter-claim

The defendant in a patent infringement suit can run:

• Non-infringement — the accused product/process does not fall within the asserted claims
• Invalidity — the patent should not have been granted (raised as a counter-claim for revocation under Section 64)
• Bolar exemption — Section 107A(a) for activities reasonably related to regulatory approval (research, development, regulatory filings)
• Parallel imports — Section 107A(b) for products imported from a person duly authorised by the patentee, in limited circumstances
• Research-use defence — narrow, limited to non-commercial experimental use

The validity counter-claim under Section 64 is the most strategically important defence. Where the patent has identifiable weaknesses — prior art, lack of inventive step, Section 3 subject-matter issues, Section 8 failure-to-disclose — the counter-claim becomes the principal litigation track, and the infringement question often becomes secondary.

Forum and procedure

Patent infringement suits are filed in the High Court with appropriate territorial jurisdiction (Section 104 Patents Act). Major patent litigation in India concentrates in Delhi, Bombay, Madras and Calcutta High Courts, all of which have established IP Division benches. The Commercial Courts Act, 2015 governs case management — fixed timelines, summary judgments where appropriate, and structured discovery.

Average timeline to final disposal: 3-6 years for trial-track matters; 6-18 months for interim-injunction outcomes that frequently shape the commercial settlement.

The takeaway

Section 108 gives Indian patentees a substantial enforcement toolkit. Injunction is the principal remedy in volume-trade infringements; damages or account of profits is the principal remedy in past-infringement-recovery matters; delivery up handles physical inventory. The interim-injunction stage frequently decides the commercial outcome of the dispute well before trial. For both patentees and accused infringers, the litigation strategy must combine substantive patent law with procedural courtcraft — including the validity counter-claim, defensive disclosures, and damages-theory planning. IPForte's patent litigation practice handles infringement matters across pharma, telecom, mechanical and consumer electronics.