ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,017, issued on May 6, was assigned to KOENIG & BAUER AG (Wurzburg, Germany).
"Cylinder for aligning magnetic or magnetizable particles contained in coating agent on a substrate and machine for generating optically variable image elements" was invented by Tobias Diehm (Wertheim, Germany), Michael Muller (Karlstadt, Germany) and Emmanuel Thony (Rennaz, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "Examples include a cylinder for aligning magnetic or magnetizable particles contained in a coating agent on a substrate. In the region of the outer circumference of the cylinder, magnetic elements are arranged in n rows extending axially and in ...