Written by: Mark Terry Alibaba Group Holding Ltd. is preparing its estimated $16 Billion IPO by fortressing itself with patents. Although Alibaba has more than 1,900 issued patents and pending applications in Asia, it has also been aggressively filing patent applications in the U.S. China’s largest e-commerce company has obtained 102 U.S. patents, including 20 purchased from IBM Corp. Alibaba has 300 pending patent applications for technologies like product recommendations, payment processing and picture searches. Why the patent buying spree? If you’re an innovator like IBM, you obtain patents to protect the hard work and millions of dollars that has