The presentations embedded in this post have been delivered by Dr. Kalyan Kankanala in his Patent Law course at National Law School of India University, Bangalore. The presentation on Intro to Patent Law gives an overview of patent philosophy. It covers social, economic and utilitarian rationales and gives an introduction to the tragedy of commons dimension. It also covers the patent life cycle, and public interest aspects of patent law. This presentation is an updated version of the 2013 presentation.