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http://www.google.com.au/patents/US3253146?utm_source=gb-gplus-share
Patent US3253146 - FLUORESCENT MARKER PIGMENT FOR ROADWAYS
FLUORESCENT MARKER PIGMENT FOR ROADWAYS
E. R. DE et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 3253146
Filing date
: 16 Aug 1962
Issue date
: 24 May 1966
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