Viagra in China 1. Despite a huge potential market and strong consumer demand for erectile dysfunction (ED) drugs in China, why has Pzer failed to generate blockbuster sales for Viagra? 2. What are the major factors that have contributed to Pfizer's ultimate success in securing its patent right for Viagra in China? 3. What are the major factors that have contributed Pzer's failure in claiming "Whigs" as its unregistered well-known trademark in China? 4. What are some alternative market entrj,r strategies that Pfizer could have pursued to improve the sales performance of Viagra, and to avoid the costly lawsuits over its patent and trademark in China