Registers – Records – Particular code pattern
Patent
1984-06-28
1986-05-20
Trafton, David L.
Registers
Records
Particular code pattern
235462, 283 77, 283904, G06K 1906
Patent
active
045903662
ABSTRACT:
The invention relates to a method of securing simple codes (5), which are built-up of a plurality of lines, symbols or patterns, which are readable by a machine, and which codes (5) are intended to be located on documents (2), valuable documents or marked units.
The invention is characterized in that in the generating or writing-down of the codes (5) one or more of said lines, symbols or patterns constituting the code (5) each are caused to transform to a line (11) or an area, which does not constitute a part of the code (5), but constitutes a part of a pattern, in order to render a falsification by altering the code after its writing-down substantially more difficult.
According to a preferred embodiment the invention further is characterized in that a so-called line code (5) is generated, and in its generation or writing-down one or several of the lines associated with the code are caused to continuously or intermittently transform to a line (11) deviating from the line associated with the code.
REFERENCES:
patent: 4423415 (1983-12-01), Goldman
patent: 4504083 (1985-03-01), Devrient et al.
Esselte Security Systems AB
Trafton David L.
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