US Patent Issued to TOYOTA JIDOSHA, SCALAR on July 14 for "Data management apparatus and data management method" (Japanese Inventors)

ALEXANDRIA, Va., July 14 -- United States Patent no. 12,681,669, issued on July 14, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan) and SCALAR INC. (Tokyo).

"Data management apparatus and data management method" was invented by Naoki Yamamuro (Nagoya, Japan) and Wataru Fukatsu (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "As a record RA1 is stored in a first distributed ledger, a controller of a client server obtains a time stamp token T0 for a record hash value RH1 thereof and has a record RB0 including the time stamp token T0 stored in a second distributed ledger. Then, as a record RA2 is stored in the first distributed ledger, the controller obtains a time stamp token T1 for a record hash valu...