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http://www.google.ca/patents/US3179791?utm_source=gb-gplus-share
Patent US3179791 - ILLUMINATING DEVICE FOR PRODUCING VARIED COLOR EFFECTS
ILLUMINATING DEVICE FOR PRODUCING VARIED COLOR EFFECTS
Philip J. Mole et al
Overview
Abstract
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Description
Claims
Patent number
: 3179791
Filing date
: 16 Apr 1962
Issue date
: 20 Apr 1965
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