"US574241123 avr. 199621 avr. 1998Advanced Deposition Technologies, Inc.Security hologram with covert messagingUS574422317 oct. 199428 avr. 1998Mercedes Benz AgMarking of vehicles to hinder theft and/or unauthorized saleUS57630869 oct. 19969 juin 1998Basf AktiengesellschaftMulltilayered, useful for coloring paint, inks, including security printing inks, plastics, ceramics, glasses, and decorative c" . . . .