CHRISTIAN ALEXSANDER, C.; S. T. KANSIL, C. Legal Protection for First Trademark Registrants: An Analysis of the Substantive Examination System of Trademarks in Indonesia. Jurisprudensi: Jurnal Ilmu Syariah, Perundang-Undangan dan Ekonomi Islam, v. 17, n. 2, p. 382-397, 14 Dec. 2025.