| Additional IP Rights Grant (Patents) | 
 |  | 
 | "This implementation" means the copyrightable works distributed by | 
 | Google as part of the WebRTC code package. | 
 |  | 
 | Google hereby grants to you a perpetual, worldwide, non-exclusive, | 
 | no-charge, 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 the WebRTC code package, 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 the WebRTC code package. 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 the WebRTC code package or any code incorporated | 
 | within this implementation of the WebRTC code package 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 the WebRTC code package shall terminate as | 
 | of the date such litigation is filed. |