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. 24
