Blockchain Germany 23-05-2019 Four banks successfully test new blockchain platform A group of four banks have successfully issued a promissory note… A group of four banks have successfully issued a promissory note — a type of legally binding finance agreement… Sign in or Upgrade to Continue Reading This news article is over 10 days old. Subscribe today to access all articles with an annual subscription. Become a member Learn more Already a subscriber? Log in here #blockchain