The Office of the Controller General of Patents, Designs and Trade Marks or CGPDTM is the body responsible for the Indian Patent Act. The Patent Office has its headquarters in Calcutta and has branches in New Delhi, Chennai and Mumbai. The office of the CGPDTM is based in Mumbai. Nagpur hosts the office of the Patent Information System and also the National Institute for Intellectual Property Management. The Controller General supervises the Act’s administration and also offers advice to the government on related matters.