nChain

The patent specification is freely available on Google Patents and consists of a 60-page document that describes the invention for which a patent is sought and demonstrates some of the applications for which the invention can be used, among other things. The patent was filed in February 2017 and was granted earlier today (November 11, 2019).

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https://patentimages.storage.googleapis.com/70/6e/1c/8676bd9d33ff81/EP3257191B1.pdf

https://nchain.com/en/