Invisibility Screen

The invisibility screen was a stealth technology developed by the House of T’Kuvma for their Sarcophagus ship that made it invisible to Federation starships. It was first discovered by the U.S.S. Shenzhou during the Battle of the Binary War. 

Following the death of T’Kuvma and General Kol’s takeover of the Sarcophagus ship, Kol shared the technology with any Klingon house that would offer him loyalty.