WordPress、百度宣布停止使用React(Native)开源项目，Facebook开源专利许可潜在的法律风险

Additional Grant of Patent Rights Version 2

"Software" means the React software distributed by Facebook, Inc.

Facebook, Inc. ("Facebook") hereby grants to each recipient of the Software

("you") a perpetual, worldwide, royalty-free, non-exclusive, irrevocable

(subject to the termination provision below) license under any Necessary

Claims, to make, have made, use, sell, offer to sell, import, and otherwise

transfer the Software. For avoidance of doubt, no license is granted under

Facebook's rights in any patent claims that are infringed by (i) modifications

to the Software made by you or any third party or (ii) the Software in

combination with any software or other technology.

The license granted hereunder will terminate, automatically and without notice,

if you (or any of your subsidiaries, corporate affiliates or agents) initiate

directly or indirectly, or take a direct financial interest in, any Patent

Assertion: (i) against Facebook or any of its subsidiaries or corporate

affiliates, (ii) against any party if such Patent Assertion arises in whole or

in part from any software, technology, product or service of Facebook or any of

its subsidiaries or corporate affiliates, or (iii) against any party relating

to the Software. Notwithstanding the foregoing, if Facebook or any of its

subsidiaries or corporate affiliates files a lawsuit alleging patent

infringement against you in the first instance, and you respond by filing a

patent infringement counterclaim in that lawsuit against that party that is

unrelated to the Software, the license granted hereunder will not terminate

under section (i) of this paragraph due to such counterclaim.

A "Necessary Claim" is a claim of a patent owned by Facebook that is

necessarily infringed by the Software standing alone.

A "Patent Assertion" is any lawsuit or other action alleging direct, indirect,

or contributory infringement or inducement to infringe any patent, including a

cross-claim or counterclaim.