Method for marking, capturing and decoding machine-readable matr

Details Method for marking, capturing and decoding machine-readable matr Method for marking, capturing and decoding machine-readable matr

1996-06-04

1998-06-30

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

235462, G06K 710

Patent

active

057738114

ABSTRACT:
The invention is a method and apparatus for the application of machine readable matrix marking symbols, and especially two-dimensional matrix symbols, to a "host" substrate, optionally covering the symbols with protective layers, then using an ultrasound imaging apparatus to capture echo signals associated with the matrix symbols, then feeding the resultant information to a matrix symbol decoder to yield human-readable and video monitor displayable information.

REFERENCES:
patent: 4729128 (1988-03-01), Grimes
patent: 4917096 (1990-04-01), Englehart et al.
patent: 5324923 (1994-06-01), Cymbalski
patent: 5324925 (1994-06-01), Koenck
patent: 5347115 (1994-09-01), Sherman
patent: 5386106 (1995-01-01), Kumar
patent: 5428212 (1995-06-01), Tani
patent: 5463212 (1995-10-01), Oshima
patent: 5590685 (1997-01-01), Chiang et al.

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