Where do tech companies go when they die? In the case of Nortel, the late Canadian telco has found an afterlife as part of a patent trolling operation that struck Android phone makers in October, and is now targeting network and cable operators in lawsuits this week in Texas and Delaware.

Nortel’s second act as the walking dead is taking place thanks to “Rockstar Consortium,” a group formed by Microsoft(s msft), Apple(s aapl) and other Google(s goog) rivals, which bought bankrupt Nortel’s patent portfolio in 2011 for $4.5 billion.

“Nortel was the source of many of the most important innovations in history in the field of telecommunications and networking,” says a new Rockstar lawsuit (embedded below) that accuses Time Warner Cable(s twc) of violating six patents, including US Patent 6128649, which was issued in the year 2000 and describes a method to show multiple screens in a video…