Method of making a machine-readable marking in a workpiece
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United States of America Patent
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Apr 6, 1982
Grant Date -
N/A
app pub date -
Sep 24, 1979
filing date -
Sep 24, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for producing a machine-readable coded marking in the surface of a workpiece comprising vaporizing sequentially the surface portions of selected ones of a series of contiguous areas of unit widths of the surface.
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