Established on August 18, 1941 almost simultaneously with Naval Technology Merit Badge https://asiamedals.info/threads/naval-technology-merit-badge.23345/
Official name of the badge
陸軍技術有功章 - Army Technology Merit Badge.
Awarded by ministry of the army for different innovations in warfare...
armytechnologymeritbadgeimperialarmy of japan
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陸軍技術徽章
陸軍技術有功章
陸軍技術有功章賞状