Enforcement of Patent Rights in India

Patent infringement proceedings can only be initiated after Grant of patent in India but it may include claim retrospectively from the date of publication of Patent in Indian Patent Journal subject to law of limitation. Under the Limitation law does not allow action/suits in respect of matter where cause of action had arisen more than three years from the date of suit.

Ordinarily the following acts are considered amounting to infringement of an invention: -
• Making
• Using
• Selling
• Distributing
• Importing
• Offering any of the above
All persons or incorporations directly or indirectly involved in any of the above stages may be held liable for infringement.

Appropriate Courts for Patent Infringement:
A suit for infringement has to be filed in a District court or High court (depending upon pecuniary jurisdiction) within whose territorial jurisdiction the cause of action has arisen. However, as soon as a counter claim for revocation of patent is filed against the suit for infringement of patent, only high court has the jurisdiction of entertain the matter and the matter has to be transferred to High Court for decision.

Burden of proof in case of Patent Infringement:
The onus of establishing the infringement is on the plaintiff. However, in case of patent involving a process for obtaining a product where the plaintiff first establishes that the products obtained are identical, the court may shift onus on the defendant.

Interim Injunction in case of Patent Infringement:
The Court may also allow interim injunction against the infringer.

Defences to Infringement of Patent in India
The following defences are available in India as a defence in Patent Infringement:
1. Any of the grounds under which Patent can be revoked
2. By govt of India or for Govt. of India for its own use
3. Experiment or research
4. Imparting instructions to pupils
5. For Patent in respect of Medicine or drug, for its own use of Govt. of India, for distribution in Govt. Dispensary and hospitals or by gazette notifications to other dispensaries, hospitals and medical institutions.