| Additional IP Rights Grant (Patents) | |
| "This implementation" means the copyrightable works 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 this | |
| implementation of VP8, 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 this | |
| implementation of VP8. This grant does not include claims that would be | |
| infringed only as a consequence of further modification of this | |
| implementation. If you or your agent or exclusive licensee institute or | |
| order or agree to the institution of patent litigation against any | |
| entity (including a cross-claim or counterclaim in a lawsuit) alleging | |
| that this implementation of VP8 or any code incorporated within this | |
| implementation of VP8 constitutes direct or contributory patent | |
| infringement, or inducement of patent infringement, then any patent | |
| rights granted to you under this License for this implementation of VP8 | |
| shall terminate as of the date such litigation is filed. |