Google's patent license for VP8 [was: Google WebM?]

Chris DiBona cdibona at
Thu May 20 21:20:09 UTC 2010

As an FYI, we're all pretty busy at Google I/O, so I wouldn't expect much
from us this week.


On Thu, May 20, 2010 at 1:36 PM, Chris Travers <chris at>wrote:

> Hmmmm....
> On Thu, May 20, 2010 at 12:53 PM, Lawrence Rosen <lrosen at>
> wrote:
> > How do you read this limited patent license in combination with a
> generous
> > BSD license? Is this a subtly phrased requirement to conform to the VP8
> > specification or to use only Google's code, or just a drafting ambiguity
> in
> > an open source patent and copyright license? I wish to believe the
> latter.
> Even if it's a drafting ambiguity (as I would assume it is), wouldn't
> that make modification unsafe?  I mean, if behavior of the software
> which is covered by a patent changes, wouldn't that mean that the
> infringement might arguably be one not necessarily violated by the
> original version?  ISTM that this is an unpleasant section to parse if
> one doesn't want to have to go to court.....
> Best Wishes,
> Chris Travers

Open Source Programs Manager, Google Inc.
Google's Open Source program can be found at
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