先せん願がん主しゅ義ぎMeaningsNoun1. first-to-file principle (in patent law); first-to-file systemKanji used先before (timewise)願wish主(one's) master義justicePitch accentせんがんしゅぎComposed of先せんformer; previous; old; first move (in go, shogi, etc.); opening moveNo-adjective願がんprayer; wish; vowNoun主しゅ義ぎdoctrine; rule; principle; -ismNounExamples1日本にほんは先せん願がん主しゅ義ぎを採さい用ようしている。Japan follows the principle of first-to-file.