Executive Summary
Patent infringement litigation in India involves complex legal and technical issues, requiring specialized expertise. Understanding the litigation framework is essential for both patentees and accused infringers:
- Forums: Commercial Courts, High Courts
- Remedies: Injunction, damages, accounts
- Defenses: Non-infringement, invalidity, prior use
- Interim relief: Anton Piller, injunctions
- Expert evidence: Technical experts crucial
- Timelines: Expedited in Commercial Courts
This guide examines patent infringement claims, defenses, and litigation strategy.
1. Statutory Framework
Patents Act Provisions
| Section |
Subject |
| Section 48 |
Rights of patentee |
| Section 104 |
Jurisdiction |
| Section 105 |
Power of court to grant relief |
| Section 106 |
Restriction on grant of injunction |
| Section 107 |
Defenses available |
Exclusive Rights (Section 48)
| Product Patent |
Process Patent |
| Make |
Use the process |
| Use |
Make product from process |
| Sell |
Use product from process |
| Offer for sale |
Sell product from process |
| Import |
Import product from process |
2. What Constitutes Infringement
Literal Infringement
| Element |
Requirement |
| Claim mapping |
Each claim element present |
| One-to-one |
Accused product matches claim |
| All elements |
Every limitation satisfied |
Doctrine of Equivalents
| Principle |
Application |
| Function |
Same function |
| Way |
Same way |
| Result |
Same result |
| Insubstantial differences |
Minor variations |
3. Jurisdiction
District Court (Section 104)
| Basis |
Application |
| Where plaintiff resides |
Domicile |
| Where plaintiff carries on business |
Business presence |
| Where cause of action arises |
Infringement location |
Commercial Courts
| Threshold |
Forum |
| Above Rs. 3 lakhs |
Commercial Division |
| All IP suits |
Commercial Courts |
| Appeals |
Commercial Appellate Division |
4. Available Remedies
Injunction
| Type |
Availability |
| Permanent |
After trial |
| Interim |
During pendency |
| Mandatory |
To remove infringing goods |
Damages
| Basis |
Calculation |
| Lost profits |
Patentee's losses |
| Reasonable royalty |
License equivalent |
| Unjust enrichment |
Infringer's profits |
Other Remedies
| Remedy |
Purpose |
| Account of profits |
Alternative to damages |
| Delivery up |
Infringing goods |
| Destruction |
Of infringing items |
| Costs |
Litigation expenses |
5. Interim Relief
Anton Piller Orders
| Feature |
Application |
| Ex parte |
Without notice |
| Search and seizure |
Evidence preservation |
| Conditions |
Strong prima facie case |
| Undertakings |
Damages if wrong |
Interim Injunction Factors
| Factor |
Assessment |
| Prima facie case |
Likely infringement |
| Balance of convenience |
Comparative hardship |
| Irreparable harm |
Damages inadequate |
| Public interest |
Broader considerations |
6. Defenses to Infringement
Non-Infringement
| Defense |
Basis |
| No claim coverage |
Accused product outside claims |
| File wrapper estoppel |
Prosecution history limits |
| Doctrine limitations |
Equivalents restricted |
Invalidity
| Ground |
Section 64 |
| Prior art |
Anticipation |
| Obviousness |
Lack of inventive step |
| Insufficient disclosure |
Section 10 |
| Section 3 |
Non-patentable subject matter |
Prior Use (Section 107)
| Requirement |
Specification |
| Before priority date |
Timing |
| Good faith |
Independent development |
| In India |
Territorial |
| Same product/process |
Exact match |
Other Defenses
| Defense |
Basis |
| Exhaustion |
First sale doctrine |
| Bolar exemption |
Regulatory approval (Section 107A) |
| Government use |
Section 100 |
| Compulsory license |
Valid license |
7. Evidence Requirements
Patent Documents
| Document |
Purpose |
| Patent specification |
Claim construction |
| Prosecution history |
Claim interpretation |
| Priority documents |
Validity assessment |
| Working statements |
Form 27 records |
Technical Evidence
| Evidence |
Use |
| Expert testimony |
Claim construction |
| Product samples |
Comparison |
| Testing reports |
Infringement analysis |
| Technical literature |
Prior art |
8. Claim Construction
Principles
| Principle |
Application |
| Claim language |
Primary guide |
| Specification |
For interpretation |
| Prosecution history |
Limitations |
| Extrinsic evidence |
Expert testimony |
Indian Approach
| Feature |
Treatment |
| Purposive construction |
Technical purpose |
| Not literal only |
Context considered |
| Patent monopoly |
Balanced interpretation |
9. Litigation Strategy
For Plaintiffs
| Strategy |
Implementation |
| Pre-suit notice |
Warning letter |
| Evidence gathering |
Before filing |
| Forum selection |
Strategic choice |
| Claim mapping |
Detailed analysis |
| Interim relief |
Early application |
For Defendants
| Strategy |
Implementation |
| Invalidity search |
Prior art investigation |
| Design-around |
Alternative products |
| License negotiation |
Settlement option |
| Counterclaim |
Revocation |
| Expert retention |
Technical defense |
10. Commercial Courts Procedure
Expedited Timeline
| Stage |
Timeline |
| Framing issues |
Within 30 days |
| Discovery |
Per case management |
| Trial |
Day-to-day preferred |
| Judgment |
90 days from arguments |
Case Management
| Feature |
Effect |
| Case management hearing |
Early scheduling |
| Limited adjournments |
Strict enforcement |
| Documentary evidence |
Emphasis on documents |
| Expedited discovery |
Faster production |
11. Damages Assessment
Lost Profits Method
| Factor |
Calculation |
| But-for sales |
Without infringement |
| Profit margin |
Per-unit profit |
| Market share |
Patentee's position |
| Price erosion |
Market impact |
Reasonable Royalty
| Factor |
Consideration |
| Comparable licenses |
Market rates |
| Hypothetical negotiation |
Willing parties |
| Established royalty |
Prior licenses |
| Georgia-Pacific factors |
Comprehensive analysis |
12. Compliance Checklist
Before Filing (Plaintiff)
Defense Preparation (Defendant)
13. Key Takeaways for Practitioners
Claim Construction Central: Claim interpretation determines infringement.
Technical Evidence Essential: Expert testimony usually required.
Invalidity is Primary Defense: Counterclaim for revocation common.
Interim Relief Decisive: Early injunction can determine outcome.
Commercial Courts Faster: Expedited procedures available.
Prior Use Defense Specific: Requires proof before priority date.
Damages Difficult: Indian courts still developing valuation methodology.
Conclusion
Patent infringement litigation in India requires sophisticated claim analysis, technical expertise, and strategic planning. The availability of Commercial Courts has accelerated proceedings, while the invalidity defense remains the most potent tool for defendants. Practitioners must master both legal and technical aspects to effectively represent clients in this specialized area.