Yusuf Khan of Sikar, Rajasthan invented a trench digger, which is an improved version of conventional trench digger. It can be attached behind a tractor during transport and can work at a speed of 10-12 km/h. It is modified version of conventional trench diggers, by incorporating wheels for making the transport easier and modifying the gearbox for making the operation faster. This product was appeared in the market in the year 2005.