The Topteletext patents licensed by Sisvel are owned by the Institut für Rundfunktechnik (“IRT”), the research centre of the German broadcasters (ARD / ZDF / DLR), Austria's broadcaster (ORF) and the Swiss public broadcaster (SRG/SSR) and by Bräu Verwaltungsgesellschaft m.b.H. (“Bräu”), a company located in Leipheim, Germany.
Since 1997, Sisvel has had the exclusive right to license IRT and Bräu Patent Portfolios related to consumer electronics products, and in particular television products.