Method of making and reading engraved and oxidation code marks o

Details Method of making and reading engraved and oxidation code marks o Method of making and reading engraved and oxidation code marks o

1995-12-27

1997-06-10

Shepperd, John

Registers

Coded record sensors

Particular sensor structure

235487, 235470, G06K 710

Patent

active

056378505

ABSTRACT:
In order to that optically readable small code marks can be correctly read by a reader, an optically readable code mark 15 is marked on an surgical instrument 14 at an optional location by using a laser, the code mark being in the form of recesses and projections which are apparently different in magnitude from roughness of the instrument surface at that location. Thus, the code mark is marked on the surgical instrument itself by laser marking and is optically read, resulting in correct reading of the mark and a considerable improvement in durability of the mark.

REFERENCES:
patent: 4095095 (1978-06-01), Muraoka et al.
patent: 4166574 (1979-09-01), Yokoyama
patent: 4585931 (1986-04-01), Duncan et al.
patent: 4745269 (1988-05-01), Van Gils
patent: 4791284 (1988-12-01), Ludden
patent: 4939354 (1990-07-01), Priddy et al.
patent: 5177346 (1993-01-01), Chisholm
patent: 5406060 (1995-04-01), Gitin
patent: 5463213 (1995-10-01), Honda

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