November 10, 2010- Microsoft and TiVo are among the 36 defendants named in a suit filed by Guardian Media alleging infringement of two expired patents related to parental control features. Accused products include DVRs, set-top boxes, personal computers and handheld devices. related to digital video recorders, personal computers and other devices. Both patents are now expired. Nintendo prevailed in an earlier suit brought Guardian in 2008 and dismissed in 2009. Guardian has initiated 42 patent suits since 2006.