Multiple structure cube corner article and method of manufacture
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United States of America Patent
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Feb 24, 1998
Issued Date -
N/A
app pub date -
Apr 19, 1996
filing date -
Oct 20, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
A retroreflective cube corner article which is a replica of a directly machined substrate comprises a plurality of single cube corner elements which are machined in the substrate. Each cube corner element is bounded by at least one groove from each of three sets of parallel grooves in the substrate so that the article comprises a plurality of different geometric structures.
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