Security material and secure document system using said material

Details Security material and secure document system using said material Security material and secure document system using said material

1977-12-09

1979-12-25

Cook, Daryl W.

Registers

Records

Magnetic

40 22, 235440, 235450, 3401463C, 346 741, G06K 1908, G09F 302, G06K 708, G11B 1110

Patent

active

041802071

ABSTRACT:
A secure document is produced by securely attaching to a support a body of including a security feature and having a shape which conveys information to the eye. For example the body is a layer of magnetizable material having apertures of letters, numbers and the like. The document can be examined by both magnetic and optical examination apparatus to cross-check that no alteration has been made. A method of making a secure document and examination apparatus is also described. The security feature may be a pattern of magnetic anisotropy fixed into the material.

REFERENCES:
patent: 2784392 (1957-03-01), Chaimowicz
patent: 2791310 (1957-05-01), Jones
patent: 3161457 (1964-12-01), Schroeder et al.
patent: 3465307 (1969-09-01), Schmidt
patent: 3505501 (1970-04-01), Ruddock et al.
patent: 3560715 (1971-02-01), Akamatsu et al.
patent: 3998160 (1976-12-01), Pearce
patent: 4023204 (1977-05-01), Lee
patent: 4044231 (1977-08-01), Beck et al.

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