| 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. |