Apple,Microsoft and Google SUED?????

When i going browsing through some sites earlier this morn, i found a news article in www.EFYTimes.com saying that an michigan based company named Cygnus systems has filed a lawsuit against tech giants Microsoft,Google and Apple. This is for violation of a patent on a particular functionality that priviliges users a brief preview of files before they open them.
This company also said tht microsoft infringed on its patent in Vista, IE and Google in Chrome and Apple in Mac OS. This was filed in court of Arizona. I donno like Company might be expecting some Revenue by doing this but i donno how good it can be for them in this crucial time like already market is into Economic Recession.