| Additional IP Rights Grant (Patents) |
| |
| "This implementation" means the copyrightable works distributed by |
| Google as part of the Dart 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 Dart, 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 Dart. 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 Dart or any code |
| incorporated within this implementation of Dart 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 Dart shall terminate as of the date such |
| litigation is filed. |
