1Additional IP Rights Grant (Patents) 2 3"This implementation" means the copyrightable works distributed by 4Google as part of the WebM Project. 5 6Google hereby grants to you a perpetual, worldwide, non-exclusive, 7no-charge, royalty-free, irrevocable (except as stated in this section) 8patent license to make, have made, use, offer to sell, sell, import, 9transfer, and otherwise run, modify and propagate the contents of this 10implementation of VP8, where such license applies only to those patent 11claims, both currently owned by Google and acquired in the future, 12licensable by Google that are necessarily infringed by this 13implementation of VP8. This grant does not include claims that would be 14infringed only as a consequence of further modification of this 15implementation. If you or your agent or exclusive licensee institute or 16order or agree to the institution of patent litigation against any 17entity (including a cross-claim or counterclaim in a lawsuit) alleging 18that this implementation of VP8 or any code incorporated within this 19implementation of VP8 constitutes direct or contributory patent 20infringement, or inducement of patent infringement, then any patent 21rights granted to you under this License for this implementation of VP8 22shall terminate as of the date such litigation is filed. 23