Editing VirtualDub (section)

===Past legal issues===
Early versions of VirtualDub supported importing of [[Microsoft]]'s [[Advanced Systems Format]], but this was removed in version 1.3d following an informal phone call from a Microsoft employee in 2000 claiming that it infringed one of Microsoft's [[patent]]s. Microsoft never identified any specific patent numbers that it believed to have been infringed, but speculation by others is that {{Cite patent|country=US|number=6041345}} (expired in 2017) might be relevant.<ref>{{Cite web|title=Microsoft patents ASF media file format, stops reverse engineering|url=https://www.advogato.org/article/101.html|archive-url=https://web.archive.org/web/20080704222646/http://www.advogato.org/article/101.html|archive-date=2008-07-04|access-date=2021-09-06|website=[[Advogato]]}}</ref>

In August 2006, VirtualDub's German users who hosted copies of VirtualDub, or even linked to them on their web pages, began receiving [[Abmahnung|cease and desist letters]] from a private individual that claimed to have German [[trademark|word mark]] on "VirtualDub".<ref>{{Cite web|url=http://forum.doom9.org/archive/index.php/t-114905.html|title=Illicit word mark registered on "VirtualDub" in Germany [Archive] - Doom9's Forum|website=forum.doom9.org}}</ref> However this issue has been resolved: the word mark in Germany has been deleted<ref>{{Cite web|url=https://register.dpma.de/DPMAregister/uebersicht|title=DPMAregister &#124; Registerauskunft des Deutschen Patent-und Markenamtes (DPMA)|website=register.dpma.de}}</ref> and an injunction has been granted against the former owner of said word mark.<ref>{{Cite web|url=http://www.virtualdub.org/blog/pivot/entry.php?id=129|title="Preliminary injunction granted in regard to German word mark VIRTUALDUB"}}</ref>