https://www.epo.org/en/node/how-can-i

How can I challenge a granted patent in India?

Since January 2005, India has had a post-grant opposition system under which you can oppose a granted patent within 12 months of the announcement of the decision to grant.

Interested parties, or the government, can also file a petition for revocation of a patent at any time during the life of the patent. Such petitions must be lodged with the Intellectual Property Appellate Board (IPAB) or at High Court level.

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