Code 616 - Trademark Used as Subject (R)Indicators: blankSubfield Codes $a Entry Element (Not repeatable) $c Qualification (Repeatable) $f Dates (Not repeatable) $j Form Subdivision (Repeatable) $x Topical Subdivision (Repeatable) $y Geographical Subdivision (Repeatable) $z Chronological Subdivision (Repeatable) $2 System Code (Not repeatable) $3 Authority Record Number (Not repeatable)