Dual groove set retroreflective cube corner article and method of manufacture
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United States of America Patent
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Dec 17, 1996
Grant Date -
N/A
app pub date -
Oct 20, 1993
filing date -
Oct 20, 1993
priority date (Note) -
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Abstract
A retroreflective cube corner article which is a replica of a directly machined substrate in which a plurality of geometric structures including cube corner elements are machined in the substrate using only two sets of parallel grooves. At least two of the grooves in at least one of the groove sets are at a different groove depth.
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