Among many inventions claimed by Indians:

Space travel
Wireless Radio Communication
Atomic Structure of matter
Medical therapy
Zero

Realistically, the greatest achievement of Indian mind is in fact "varna" or Caste, i.e. specialization of labour based on skin colour. Varna = skin colour in Sanskrit. Higher castes are lighter skinned. Skin whitening creams are a HUGE industry in India.

The English took 3 things from India - Tea, Umbrella, and Caste System that they implemented in their own society and spread around the world.