US 12,306,979 B2
Information management system and information management method
Masahiko Ishii, Okazaki (JP); Hidetaka Asano, Nisshin (JP); Akiko Tamura, Nisshin (JP); Koji Hetsugi, Toyota (JP); Ryota Suzuki, Ikeda (JP); and Keiichi Koga, Narashino (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Apr. 5, 2023, as Appl. No. 18/130,963.
Claims priority of application No. 2022-070098 (JP), filed on Apr. 21, 2022.
Prior Publication US 2023/0342484 A1, Oct. 26, 2023
Int. Cl. H04L 9/00 (2022.01); G06F 16/182 (2019.01); G06F 16/23 (2019.01); G06F 21/62 (2013.01)
CPC G06F 21/6218 (2013.01) [G06F 16/182 (2019.01)] 8 Claims
OG exemplary drawing
 
1. An information management system that manages information on a chemical substance contained in a product distributed in a supply chain based on a distributed ledger technology, the information management system comprising:
a management apparatus that manages the information management system, the management apparatus including a first distributed ledger including a list that shows a chemical substance managed in the information management system; and
a first apparatus that belongs to a company included in the supply chain, the first apparatus including a second distributed ledger including the list, wherein
the chemical substance included in the list refers to a chemical substance designated under laws and regulations,
when a new chemical substance is designated under the laws and regulations, the management apparatus adds the designated chemical substance to the list in the first distributed ledger to update the list in the first distributed ledger, and
the management apparatus transmits to the first apparatus, first transaction data that proposes addition of the designated chemical substance and update of the list in the second distributed ledger, and
the first apparatus
updates the list in the second distributed ledger based on the first transaction data, and
transmits to a second apparatus that belongs to a downstream company in the supply chain, second transaction data including information on the designated chemical substance contained in a product supplied to the downstream company and included in the list in the second distributed ledger.