"VirtualDub FilterMod / Wiki / Home". Retrieved 2017-05-25. ↑ Advogato: Microsoft patents ASF media file format, stops reverse engineering ↑ Illicit word mark registered on "VirtualDub" in Germany - virtualdub.org ↑ Official status of German word mark 30601877 "VIRTUALDUB" ↑ "Preliminary injunction granted in regard to German word mark VIRTUALDUB"