Bollywood superstar Shah Rukh Khan, who is often called SRK, now wants to stop people from using his initials for other purposes, it seems. Buzz has it, that the actor has written to the Trade Mark Registry office in Delhi, seeking to trademark his initials. A source close to the superstar was saying that as Khan is a big brand nowadays, he feels it prudent to safeguard his brand and as such, he doesn’t want his initials to be used by others to market their products. Incidentally, Sachin Tendulkar is another celebrity, whose name is protected by trademark. Khan will be next seen playing a romantic role opposite Katrina Kaif and Anushka Sharma in Yash Chopra’s directorial comeback Jab Tak Hai Jaan.