New Delhi: Congress leader and Rajya Sabha MP Jairam Ramesh on Tuesday said that he once said that we should have taken a patent on the word Congress, but we made a mistake. Today, there are many political parties in the name of Congress in the country. Congress national general secretary Jairam Ramesh also questioned the opposition unity without the Congress, saying that various parties have taken a lot from us over the years, but have not given us anything. Former Union minister and Congress veteran Jairam Ramesh today attacked opposition parties on the question of unity among the opposition without the Congress, saying an opposition cannot be imagined without the Congress party. On the question of opposition parties eating in the Congress area in many states, Jairam Ramesh said, "Various parties have taken a lot from us over the years, but have not given us anything.'' Jairam Ramesh said, 'I had once said that we should have taken a patent on the word 'Congress'. We made a mistake. Today you will see that many political parties exist in the name of Congress in our country. Mentioning names like YSR Congress, Trinamool Congress (TMC) and Nationalist Congress Party (NCP), he said that the founders of all these three parties were earlier part of the Congress party.' CM Shivraj told - How to work 18 hours every day? BJP praises Lalu Yadav's daughter, says 'God should give such daughters to everyone' 'No govt has said this to date..', Center said in SC on Sisodia's allegation