I am an ECE. I just need to know precisely about Innovative engineering designs that caused the development of rural India. It should have created a revolution by solving the common man's problem. Give me 10 to 15 examples of such innovations produced. Please refrain from giving me examples like telephones, etc.I need some very new kinda device created applying the engineering principles we study. There can be n number of approaches to these problems and the device cannot obviously eradicate the problem completely. That is why i am confused like how such devices are created. Few examples will clarify my doubt .thank you.