Unified Messaging Solutions (UMS) [NPE] filed a suits against Etsy, alleging that the defendants’ webmail services infringe five patents related to web-based messaging systems.  UMS has filed over 20 prior suits since March 2011 against over 40 defendants including American Express, AT&T, Bank of New York  Mellon, eBay, Facebook, Google, Morgan Stanley, RIM, Sprint Nextel, T-Mobile, Time Warner, Travelocity, Twitter, Vanguard, Verizon, Walgreen, and Yahoo.  UMS, a subsidiary of Acacia Research, is the exclusive licensee [...]