194244 ⎘
Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency; Testing electrical properties of the materials thereof Measuring conductivity by direct contact
Surface-modified fluorescent carbon nanotubes for product verification
#2Apparatus for checking banknotes
#3Paper-or Cardboard-Based Security Product
#4Document containing security images
#5Banknote foreign object detection using pressure sensing array