The history of blockchain began in 1991, when Stuart Haber and W. Scott stornetta published a paper describing an encryption protected blockchain. Another 18 years later, a developer claiming to be Nakamoto released a white paper, which established the blockchain model. Then one year later, the first blockchain will be used as a public ledger for transactions using bitcoin. The number of U.S. blockchain patents increased from 3 to 2660 within five years U.S. blockchain patents began to appear...