| http://www.w3.org/ns/prov#value | - Patent US4973425 - Liquid crystal composition and use thereof - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsLiquid crystal composition which comprises at least one liquid crystalline compound having an optically active ??-lactone ring of the formula (A): ##STR1## wherein R1 is a group selected from the group consisting of ##STR2## n and
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