ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,440,897, issued on Oct. 14, was assigned to ADDUP (Cebazat, France).
"Plate, kit and method for calibrating an additive manufacturing apparatus" was invented by Antoine Anneton (Cebazat, France) and Raphael Vernet (Cebazat, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A removable calibration plate (10) comprises a sheet (20) comprising an upper face (21) intended to face towards the powerful incident-radiation beam, and bearing a reference marking (30) and being intended to receive a test marking (40), and a lower face (23). The plate (10) comprises an etching layer (22) to be etched by a powerful incident-radiation beam (F), this layer being s...