ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,561,015, issued on Feb. 24, was assigned to FRESHAPE SA (Villaz-St-Pierre, Switzerland).
"Writable-erasable medium and a hand holdable writing device" was invented by Yen-Cheng Kung (Tolochenaz, Switzerland) and Yuhang Liu (Bussigny, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention concerns a hand holdable writing tool for generating a visual representation on a writable-erasable, passive medium. The invention also provides the assembly of the writing tool and the medium. The writing tool comprises a sensor capable of sensing non-visible light, and a data processing entity, configured for activating and/or disactivating i...