Additional IP Rights Grant (Patents) ------------------------------------

"These implementations" means the copyrightable works that implement the
WebM codecs distributed by Google as part of the WebM Project.

Google hereby grants to you a perpetual, worldwide, non-exclusive,
no-charge, royalty-free, irrevocable (except as stated in this section)
patent license to make, have made, use, offer to sell, sell, import,
transfer, and otherwise run, modify and propagate the contents of these
implementations of WebM, where such license applies only to those patent
claims, both currently owned by Google and acquired in the future,
licensable by Google that are necessarily infringed by these
implementations of WebM. This grant does not include claims that would be
infringed only as a consequence of further modification of these
implementations. If you or your agent or exclusive licensee institute or
order or agree to the institution of patent litigation or any other patent
enforcement activity against any entity (including a cross-claim or
counterclaim in a lawsuit) alleging that any of these implementations of
WebM or any code incorporated within any of these implementations of WebM
constitute direct or contributory patent infringement, or inducement of
patent infringement, then any patent rights granted to you under this
License for these implementations of WebM shall terminate as of the date
such litigation is filed.


