As a student of mechanical engineering at IIT Bombay, Abhijit Patil was always interested in making machines. From a low-cost scanner and 3D printer to developing a technique to fast-track jaw surgery — by making a customised implant using 3D printing — Patil has several innovations to his credit. Thus, when a Google start-up event was held in the campus in 2014, it was the perfect opportunity for him to display his skills.