In an attempt to grant a monopoly on counterfeiting to the Federal Reserve the United States government has been working with printer manufacturers. This cooperation, better known as corporatism, has lead to certain printer manufacturers equipping prints to place tiny dots on every page printed in order to trace what printer any document came from. No publicly available list of printer manufacturers who were implementing this system was publicly available until now. Through a Freedom of Information Act (FOIA) request we now know who these printer manufacturers are:
Basically every major printer manufacturer. Still it’s nice to have a definitive list to reference.