High density matrix code

Details High density matrix code High density matrix code

1979-08-01

1981-04-21

Cook, Daryl W.

Registers

Coded record sensors

Particular sensor structure

235487, 235494, G06K 714, G06K 1906

Patent

active

042635047

ABSTRACT:
A machine-readable matrix-type code has either repeated or non-repeated dot patterns in one direction representing digital characters which are read by a sensor moved in a direction which is generally normal to the patterns. The patterns of the code may be formed in a manner wherein the sensor views a portion of repeated patterns, or the code may be of lesser magnitude wherein the entire non-repeated pattern area is covered by the field of view of the sensor.

REFERENCES:
patent: 3206592 (1965-09-01), Nadler
patent: 3514616 (1970-05-01), Kolb
patent: 3588452 (1971-06-01), Kee
patent: 3660641 (1972-05-01), Levasseur
patent: 3776454 (1973-12-01), Jones
patent: 3845279 (1974-10-01), Rosdorff

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