先せん発はつ明めい主しゅ義ぎMeaningsNoun1. first-to-invent principle (in patent law); first-to-invent systemKanji used先before (timewise)発let out明bright主(one's) master義justiceComposed of先せんformer; previous; old; first move (in go, shogi, etc.); opening moveNo-adjective発はつ明めいinventionNoun主しゅ義ぎdoctrine; rule; principle; -ismNoun