Earlier quoted context omitted.
They are supposed to be, but Disney doesn't think so: https://arstechnica.com/gadgets/2026/03/av1s-open-royalty-fr... Also, let's not forget that the majority of devices still don't have AV1 hardware decoding support. For example, Apple only recently (2023) added support with iPhone 15 Pro and M3 Macs.
The claims made by Dolby that some H.265 patent claims that are formulated very vaguely also apply to AV1 are probably bogus. Like many other such frivolous patent lawsuits, Dolby hopes to either scare the other company into making a deal in order to avoid bigger legal expenses, or to establish a legal precedent if their cunning lawyers can convince a technically incompetent jury that the H.265 patents are applicable…
I'm no expert, but Google having designed AV1, I can certainly imagine a world where the codec infringes upon HEVC just enough that the lawsuit fees would come out in the wash.