Blockchain system, approval terminal, user terminal, history management method, and history management program
US12124475B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Oct 30, 2019 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | Sep 30, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/50
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A history of data can be easily traced on a blockchain. A blockchain system includes a user terminal 1 and an approval terminal 2. The user terminal 1 includes a transaction issuing unit 13 that issues a transaction for updating a value of a variable of a smart contract. The approval terminal 2 includes a block generation unit 153 that generates a block including the transaction and updates the value of the variable, and reflects the block and an update block number of the block in which the value of the variable is updated to a distributed ledger 11 of a terminal of the blockchain system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.