PROTECTIVE FIBER, DOCUMENT PROTECTED BY SUCH FIBER, PROTECTED DOCUMENT MANUFACTURE METHOD AND METHOD FOR CONTROLLING AUTHENTICITY AND READ-OUT OF CODED INFORMATION OF PROTECTED DOCUMENT Russian patent published in 1998 - IPC

FIELD: manufacture of protected documents. SUBSTANCE: visually controlled and machine-read protective fiber has at least two sensed protective devices on it. First sensed protective device has machine-read regular pattern and second sensed protective device has visually controlled metal signs. Such protective fibers are adapted for usage with protected documents, such as banknotes etc, labels and other document or identification means used for the purposes allowing authentication of each specimen to be performed at least once during service life of the document. EFFECT: increased efficiency and simplified method. 19 cl, 4 dwg