This unique study investigates the path of innovation in the electrical, electronics and communications engineering industries. It presents a holistic, multi-disciplinary analysis of innovation based on case studies of paradigm-changing inventions - spanning two hundred years - which altered the course of the global economy. The stimuli and constraints which control the dynamics of these innovations are pin-pointed in this book and applied to emerging technologies. Roger Cullis tests the analysis using a recent technology which underpins the embryonic information-based economy. He demonstrates that it is possible to use the hierarchical and time dependent nature of the stimuli and constraints he has identified to predict the likely success of a new technological invention. Considering the impact of all factors which contribute to the success of innovations, this unique book will be of great interest to inventors, patent attorneys and intellectual property practitioners and academics. It will also interest licensing executives and venture capitalists, innovation economists and government policymakers.