The European Patent Office has disallowed a patent on the medicinal properties of the Neem plant
But the Indian government successfully argued that the medicinal neem tree is part of traditional Indian knowledge.
The winning challenge comes after years of campaigning and legal efforts against so-called "bio-piracy".
Leading the campaign in the neem case was the EU Parliament's Green Party, India-based Research Foundation for Science, Technology and Ecology (RFSTE) and the International Federation of Organic Agriculture Movements (IFOAM).
This historic precedent must be further developed
Linda Bullard, IFOAM
"Denying the patent means upholding the value of 'traditional' for millions of [people] not only in India but throughout the South. The free tree will stay free," said RFSTE director, Dr Vandana Shiva.