Why does IBM file largest number of patents?

Why does IBM file largest number of patents?

IBM has been patent leader in USPTO for almost 27 years. In this article, we try to find how IBM develop its patent portfolio? What is IBM's IP strategy? How does IBM use IP so powerfully? How has IBM become a patent leader? 

Comparison of Patent Litigation systems in the US, UK, China, and Germany

Comparison of Patent Litigation systems in the US, UK, China, and Germany

In this paper, we review the patent litigation system of four countries including the US, UK, Germany, and China with focusing more on their patent litigation procedure, cost, duration, and allowability of contingency.