https://github.com/webmproject/libwebm/blob/master/PATENTS.TXT
Hi Patrick Bos, Google applies a weak patent retaliation clause to WebM, i.e.
Raúl Kripalani
1

That’s true. Very good that you highlight this aspect of Facebook’s patent license! The reason I mentioned WebM is that to my knowledge Google was actually the first to use a BSD + patents file setup, which probably inspired Facebook. I thought this might make your story a bit more complete. The way you present it now it looks like Facebook’s move comes out of nowhere, while in fact it didn’t.

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