"It has invested most of its resources on litigation with software giants. The company originally filed suit in Concord against Oracle in 2002 for patent infringement, but it was thrown out by the U.S. District Court in March 2007. That decision was upheld in the Court of Appeals on May 14. The suit against Skype and eBay — filed in September 2006 – claims that the companies infringed on Mangosoft’s “dynamic directory service” software. The defendants countered by questioning whether Mangosoft should have received the patent in the first place, citing a number of previous patents which – it alleges – Mangosoft should have cited in its application."