公开(公告)号：US20200160354A1

公开(公告)日：2020-05-21

申请号：US16634753

申请日：2018-08-06

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： James W. Howard ,  Siddhant Vashist ,  Carlo D. Supina ,  Karl Battle ,  Jonathan L. Diaz-Lopez ,  James B. Snyder ,  James L.C. Werness, Jr. ,  Tien Yi T.H. Whiting

IPC: G06Q30/00 ,  G06F16/23 ,  G06K19/06

Abstract: In some examples, an article may include a layer having a first surface marked with a first code. The article may include a second surface marked with a second code, the second code obscured by the layer to be unreadable through the layer. The first code and the second code may be associated in transaction data stored by a blockchain managed by a consensus network of nodes.