Google tries to patent an existing algorithm designed for public domain.

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After Patent Office Rejection, It is Time For Google To Abandon Its Attempt to Patent Use of Public Domain Algorithm

https://www.eff.org/deeplinks/2018/08/after-patent-office-rejection-it-time-google-abandon-its-attempt-patent-use-public

https://framapiaf.org/media/XdXL1jk5RB8cXqKRZnc