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