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Yann Collet4ded9e52016-08-30 10:04:33 -07001Additional Grant of Patent Rights Version 2
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3"Software" means the Zstandard software distributed by Facebook, Inc.
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5Facebook, Inc. ("Facebook") hereby grants to each recipient of the Software
6("you") a perpetual, worldwide, royalty-free, non-exclusive, irrevocable
7(subject to the termination provision below) license under any Necessary
8Claims, to make, have made, use, sell, offer to sell, import, and otherwise
9transfer the Software. For avoidance of doubt, no license is granted under
10Facebooks rights in any patent claims that are infringed by (i) modifications
11to the Software made by you or any third party or (ii) the Software in
12combination with any software or other technology.
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14The license granted hereunder will terminate, automatically and without notice,
15if you (or any of your subsidiaries, corporate affiliates or agents) initiate
16directly or indirectly, or take a direct financial interest in, any Patent
17Assertion: (i) against Facebook or any of its subsidiaries or corporate
18affiliates, (ii) against any party if such Patent Assertion arises in whole or
19in part from any software, technology, product or service of Facebook or any of
20its subsidiaries or corporate affiliates, or (iii) against any party relating
21to the Software. Notwithstanding the foregoing, if Facebook or any of its
22subsidiaries or corporate affiliates files a lawsuit alleging patent
23infringement against you in the first instance, and you respond by filing a
24patent infringement counterclaim in that lawsuit against that party that is
25unrelated to the Software, the license granted hereunder will not terminate
26under section (i) of this paragraph due to such counterclaim.
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28A "Necessary Claim" is a claim of a patent owned by Facebook that is
29necessarily infringed by the Software standing alone.
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31A "Patent Assertion" is any lawsuit or other action alleging direct, indirect,
32or contributory infringement or inducement to infringe any patent, including a
33cross-claim or counterclaim.