| Utility: HOT-ROLLED STEEL SHEET HAVING EXCELLENT DURABILITY AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 14 Jan 2021 | 15 Nov 2018 | 14 Jan 2021 |
| Utility: LOW-TEMPERATURE STEEL MATERIAL HAVING EXCELLENT TOUGHNESS IN WELDING PORTION THEREOF AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 14 Jan 2021 | 21 Aug 2018 | 14 Jan 2021 |
| Utility: Complex-phase steel sheet having excellent formability and method of manufacturing the same Filling date: 6 Sep 2025 Issue date: 12 Jan 2021 | 7 Mar 2017 | 12 Jan 2021 |
| Utility: Non-heat treated wire rod having excellent cold workability and manufactured method therefor Filling date: 6 Sep 2025 Issue date: 12 Jan 2021 | 11 Nov 2016 | 12 Jan 2021 |
| Utility: MULTILAYERED ZINC ALLOY PLATED STEEL MATERIAL HAVING EXCELLENT SPOT WELDABILITY AND CORROSION RESISTANCE Filling date: 6 Sep 2025 Issue date: 7 Jan 2021 | 13 Dec 2018 | 7 Jan 2021 |
| Utility: ZINC ALLOY PLATED STEEL MATERIAL HAVING EXCELLENT CORROSION RESISTANCE AFTER BEING PROCESSED AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 7 Jan 2021 | 13 Dec 2018 | 7 Jan 2021 |
| Utility: High-strength steel having superior brittle crack arrestability, and production method therefor Filling date: 6 Sep 2025 Issue date: 5 Jan 2021 | 21 Dec 2015 | 5 Jan 2021 |
| Utility: PREPARATION METHOD FOR LITHIUM PHOSPHATE, PREPARATION METHOD FOR LITHIUM HYDROXIDE, AND PREPARATION METHOD FOR LITHIUM CARBONATE Filling date: 6 Sep 2025 Issue date: 31 Dec 2020 | 18 Dec 2018 | 31 Dec 2020 |
| Utility: ZINC-BASED PLATED STEEL SHEET HAVING POST-TREATED COATING FORMED THEREON AND POST-TREATMENT METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 24 Dec 2020 | 8 Sep 2020 | 24 Dec 2020 |
| Utility: SINGLE LAYER ZINC ALLOY PLATED STEEL MATERIAL EXHIBITING EXCELLENT SPOT WELDABILITY AND CORROSION RESISTANCE, AND FABRICATION METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 24 Dec 2020 | 21 Dec 2017 | 24 Dec 2020 |
| Utility: HIGH STRENGTH STEEL SHEET HAVING EXCELLENT FORMABILITY AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 24 Dec 2020 | 4 Aug 2017 | 24 Dec 2020 |
| Utility: HOT-ROLLED COATED STEEL SHEET WITH EXCELLENT WORKABILITY AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 24 Dec 2020 | 23 Dec 2016 | 24 Dec 2020 |
| Utility: HOT-DIP GALVANIZED STEEL SHEET HAVING EXCELLENT LOW-TEMPERATURE ADHESION AND WORKABILITY, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 17 Dec 2020 | 20 Dec 2018 | 17 Dec 2020 |
| Utility: STEEL MATERIAL FOR LOW YIELD RATIO, HIGH-STRENGTH STEEL PIPE HAVING EXCELLENT LOW-TEMPERATURE TOUGHNESS, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 17 Dec 2020 | 18 Dec 2018 | 17 Dec 2020 |
| Utility: UTILITY FERRITIC STAINLESS STEEL WITH EXCELLENT HOT WORKABILITY AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 17 Dec 2020 | 7 Nov 2018 | 17 Dec 2020 |
| Utility: HIGH-STRENGTH HOT-ROLLED PLATED STEEL SHEET, AND METHOD FOR PRODUCING SAME Filling date: 6 Sep 2025 Issue date: 17 Dec 2020 | 6 Mar 2018 | 17 Dec 2020 |
| Utility: High strength welding joint having excellent impact toughness at very low temperature, and flux-cored arc welding wire therefor Filling date: 6 Sep 2025 Issue date: 15 Dec 2020 | 13 Nov 2018 | 15 Dec 2020 |
| Utility: WEAR-RESISTANT STEEL HAVING EXCELLENT HARDNESS AND IMPACT TOUGHNESS, AND METHOD FOR PRODUCING SAME Filling date: 6 Sep 2025 Issue date: 10 Dec 2020 | 21 Dec 2018 | 10 Dec 2020 |
| Utility: CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY COMPRISING SAME Filling date: 6 Sep 2025 Issue date: 10 Dec 2020 | 7 Dec 2018 | 10 Dec 2020 |
| Utility: HIGH-STRENGTH STEEL SHEET HAVING EXCELLENT IMPACT RESISTANCE, AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 10 Dec 2020 | 20 Nov 2018 | 10 Dec 2020 |
| Utility: FERRITE-BASED STAINLESS STEEL HAVING IMPROVED PIPE-EXANDING WORKABILITY AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 10 Dec 2020 | 5 Oct 2018 | 10 Dec 2020 |
| Utility: ALLOY-COATED STEEL SHEET AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 10 Dec 2020 | 18 May 2018 | 10 Dec 2020 |
| Utility: CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR MANUFACTURING SAME, AND LITHIUM SECONDARY BATTERY COMPRISING SAME Filling date: 6 Sep 2025 Issue date: 10 Dec 2020 | 26 Dec 2017 | 10 Dec 2020 |
| Utility: COLD-ROLLED STEEL PLATE FOR HOT FORMING, HAVING EXCELLENT CORROSION-RESISTANCE AND SPOT-WELDABILITY, HOT-FORMED MEMBER, AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 10 Dec 2020 | 26 Sep 2017 | 10 Dec 2020 |
| Utility: PLATED STEEL SHEET HAVING EXCELLENT SURFACE QUALITY, STRENGTH AND DUCTILITY Filling date: 6 Sep 2025 Issue date: 3 Dec 2020 | 3 Aug 2018 | 3 Dec 2020 |
| Utility: ALLOY-PLATED STEEL MATERIAL HAVING EXCELLENT CORROSION RESISTANCE AND HIGH SURFACE QUALITY, AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 3 Dec 2020 | 22 Dec 2017 | 3 Dec 2020 |
| Utility: CASTING SLIDING GATE Filling date: 6 Sep 2025 Issue date: 3 Dec 2020 | 22 Dec 2017 | 3 Dec 2020 |
| Utility: METHOD FOR PRODUCING ALLOY STEEL Filling date: 6 Sep 2025 Issue date: 3 Dec 2020 | 4 Sep 2017 | 3 Dec 2020 |
| Utility: Grain-oriented electrical steel sheet and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 1 Dec 2020 | 18 Dec 2015 | 1 Dec 2020 |
| Utility: MAGNESIUM ALLOY SHEET AND METHOD FOR PRODUCING SAME Filling date: 6 Sep 2025 Issue date: 26 Nov 2020 | 21 Dec 2018 | 26 Nov 2020 |
| Utility: APPARATUS FOR PRODUCING PRECURSOR HAVING CONCENTRATION GRADIENT AND MATERIAL INJECTION SCHEDULING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 26 Nov 2020 | 12 Dec 2018 | 26 Nov 2020 |
| Utility: NON-MAGNETIC AUSTENITIC STAINLESS STEEL HAVING IMPROVED STRENGTH AND SURFACE CONDUCTIVITY Filling date: 6 Sep 2025 Issue date: 26 Nov 2020 | 5 Oct 2018 | 26 Nov 2020 |
| Utility: ULTRAHIGH STRENGTH COLD-ROLLED STEEL SHEET AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 19 Nov 2020 | 20 Dec 2018 | 19 Nov 2020 |
| Utility: ELECTRICAL STEEL SHEET ADHESIVE COATING COMPOSITION, ELECTRICAL STEEL SHEET PRODUCT, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 19 Nov 2020 | 17 Dec 2018 | 19 Nov 2020 |
| Utility: ULTRA-HIGH-STRENGTH HOT-ROLLED STEEL SHEET, STEEL PIPE, MEMBER, AND MANUFACTURING METHODS THEREFOR Filling date: 6 Sep 2025 Issue date: 19 Nov 2020 | 13 Dec 2018 | 19 Nov 2020 |
| Utility: Aluminum-based alloy plated steel sheet having excellent processing part corrosion resistance Filling date: 6 Sep 2025 Issue date: 17 Nov 2020 | 22 Dec 2017 | 17 Nov 2020 |
| Utility: Pressure vessel steel plate having excellent post weld heat treatment resistance, and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 10 Nov 2020 | 3 Nov 2016 | 10 Nov 2020 |
| Utility: Lightweight composite metal sheet having excellent vibration damping characteristics, and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 10 Nov 2020 | 2 Sep 2016 | 10 Nov 2020 |
| Utility: HIGH-STRENGTH STEEL HAVING EXCELLENT LOW-YIELD-RATIO CHARACTERISTICS, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 5 Nov 2020 | 24 Dec 2018 | 5 Nov 2020 |
| Utility: HIGH-STRENGTH AUSTENITE-BASED HIGH-MANGANESE STEEL MATERIAL AND MANUFACTURING METHOD FOR SAME Filling date: 6 Sep 2025 Issue date: 5 Nov 2020 | 20 Dec 2018 | 5 Nov 2020 |
| Utility: HIGH STRENGTH STEEL PLATE AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 5 Nov 2020 | 28 Nov 2018 | 5 Nov 2020 |
| Utility: HIGH-STRENGTH STEEL SHEET HAVING EXCELLENT PROCESSABILITY AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 5 Nov 2020 | 11 Oct 2018 | 5 Nov 2020 |
| Utility: STEEL SHEET HAVING EXCELLENT IMAGE CLARITY AFTER PAINTING AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 5 Nov 2020 | 13 Sep 2018 | 5 Nov 2020 |
| Utility: CRYOGENIC STEEL PLATE AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 5 Nov 2020 | 22 Jun 2018 | 5 Nov 2020 |
| Utility: Method for separating propylene carbonate in preparing process of polyether carbonate polyol Filling date: 6 Sep 2025 Issue date: 3 Nov 2020 | 15 Dec 2017 | 3 Nov 2020 |
| Utility: Surface-treatment solution composition containing trivalent chromium and inorganic compound, zinc-based plated steel sheet surface-treated using same, and method for producing same Filling date: 6 Sep 2025 Issue date: 3 Nov 2020 | 29 Sep 2017 | 3 Nov 2020 |
| Utility: High-strength steel having superior brittle crack arrestability, and production method therefor Filling date: 6 Sep 2025 Issue date: 3 Nov 2020 | 21 Dec 2015 | 3 Nov 2020 |
| Utility: MOLTEN MANGANESE-CONTAINING STEEL PRODUCTION METHOD, HOLDING FURNACE, AND MOLTEN MANGANESE-CONTAINING STEEL PRODUCTION EQUIPMENT USING HOLDING FURNACE Filling date: 6 Sep 2025 Issue date: 29 Oct 2020 | 10 Jul 2020 | 29 Oct 2020 |
| Utility: STEEL SHEET WITH EXCELLENT BAKE HARDENING PROPERTIES AND CORROSION RESISTANCE AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 29 Oct 2020 | 30 Nov 2018 | 29 Oct 2020 |
| Utility: Grain-oriented electrical steel plate and manufacturing method thereof Filling date: 6 Sep 2025 Issue date: 27 Oct 2020 | 21 Dec 2015 | 27 Oct 2020 |
