Xerox Wins Patent for Blockchain System That Tracks Revisions to ...
Xerox was awarded a patent by the U.S. Patent and Trademark Office for a blockchain platform that can track amendments made to electronic documents.
Xerox wins patent for blockchain implementation in tracking changes to e-docs
IBM Submits Patent For Open Scientific Research on the Blockchain
American Express (Amex) Files New Blockchain Patent to Correlate Images of Receipts With Stored Records