Optically changing element with a series of thin-film layers
RU2309049C2
Optically changeable element with partial transparent element
RU2294841C2
Embossing film and protected document
RU2296378C2
Multi-layered body with first layer sensitive to laser radiation and second layer sensitive to laser radiation and method for forming multi-layer image in such a multi-layered body
RU2286888C2
Multi-layered image, in particular, multi-colored image
RU2294416C2
Multilayer body comprising substrate at least partly consisting of paper material, and method for manufacturing of laser-induced marking on or in such multilayer body
RU2294287C2
Multi-layer element with at least one element containing material sensitive to laser emission
