letter patent; patent / concession
特許
After international legal battles with rival companies, his firm finally secured a letter patent for the invention of a novel structure, the result of years of R&D.
letter patent; patent
concession
アカウントを持っていませんか? 新規登録
アカウントを持っていますか? ログイン
DiQt(ディクト)
無料
★★★★★★★★★★