Additional IP Rights Grant (Patents) "This implementation" means the copyrightable works distributed byGoogle 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 thisimplementation of VP8, where such license applies only to those patentclaims, both currently owned by Google and acquired in the future,licensable by Google that are necessarily infringed by thisimplementation of VP8. This grant does not include claims that would beinfringed only as a consequence of further modification of thisimplementation. If you or your agent or exclusive licensee institute ororder or agree to the institution of patent litigation against anyentity (including a cross-claim or counterclaim in a lawsuit) allegingthat this implementation of VP8 or any code incorporated within thisimplementation of VP8 constitutes direct or contributory patentinfringement, or inducement of patent infringement, then any patentrights granted to you under this License for this implementation of VP8shall terminate as of the date such litigation is filed.