U.S. District Judge Thomas Griesa in Manhattan said the plaintiffs failed to show that BlackBerry and top officials materially misled them in touting how well customers were accepting the devices, and failing to take writedowns fast enough when sales proved disappointing. Once known as Research in Motion, BlackBerry launched BlackBerry 10 in January 2013 in a bid to recoup market share lost to Apple Inc’s (AAPL.O) iPhone, and Samsung Electronics Co Ltd devices powered by Google Inc’s (GOOGL.O) Android.