Medianna, O.; Lie, G. Reformulation of Annual Patent Fee Payment Regulations As an Effort to Prevent the Loss of Intellectual Property Rights: Reformulasi Pengaturan Pembayaran Biaya Tahunan Paten Sebagai Upaya Mencegah Hapusnya Hak Kekayaan Intelektual. acopen 2025, 10, 10.21070/acopen.10.2025.12868.