A well constructed patent wall makes a pretty good moat for some. See Qualcomm, 40 years in the game and 40 Billion in annual revenue. I have worked with compan

A well constructed patent wall makes a pretty good moat for some. See Qualcomm, 40 years in the game and 40 Billion in annual revenue. I have worked with companies (with a better mouse trap) trying to bring it to market. Very tough.