| Utility: GALVANIZED STEEL SHEET HAVING EXCELLENT PLATING ADHESION AND CORROSION RESISTANCE, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 13 Jan 2022 | 27 Nov 2019 | 13 Jan 2022 |
| Utility: HIGH-STRENGTH STEEL WITH EXCELLENT DURABILITY AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 13 Jan 2022 | 26 Nov 2019 | 13 Jan 2022 |
| Utility: STEEL MATERIAL HAVING EXCELLENT HYDROGEN INDUCED CRACKING RESISTANCE, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 13 Jan 2022 | 19 Nov 2019 | 13 Jan 2022 |
| Utility: ORGANIC-INORGANIC COMPOSITE COATING COMPOSITION, AND ZINC-PLATED STEEL SHEET SURFACE-TREATED USING SAME Filling date: 6 Sep 2025 Issue date: 13 Jan 2022 | 8 Nov 2019 | 13 Jan 2022 |
| Utility: METHOD FOR MANUFACTURING NEEDLE-SHAPED OR ROD-SHAPED POROUS IRON POWDER AND NEEDLE-SHAPED OR ROD-SHAPED POROUS IRON POWDER MANUFACTURED THEREBY Filling date: 6 Sep 2025 Issue date: 13 Jan 2022 | 4 Nov 2019 | 13 Jan 2022 |
| Utility: FERRITIC STAINLESS STEEL HAVING IMPROVED CORROSION RESISTANCE, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 13 Jan 2022 | 1 Nov 2019 | 13 Jan 2022 |
| Utility: NONMAGNETIC AUSTENITIC STAINLESS STEEL AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 13 Jan 2022 | 31 Oct 2019 | 13 Jan 2022 |
| Utility: HIGH-STRENGTH STEEL HAVING EXCELLENT RESISTANCE TO SULFIDE STRESS CRACKING, AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 13 Jan 2022 | 25 Oct 2019 | 13 Jan 2022 |
| Utility: LITHIUM COMPOUND, NICKEL-BASED CATHODE ACTIVE MATERIAL, METHOD FOR PREPARING LITHIUM OXIDE, METHOD FOR PREPARING NICKEL-BASED CATHODE ACTIVE MATERIAL, AND SECONDARY BATTERY USING SAME Filling date: 6 Sep 2025 Issue date: 13 Jan 2022 | 11 Oct 2019 | 13 Jan 2022 |
| Utility: MAGNESIUM ALLOY SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 13 Jan 2022 | 24 Sep 2019 | 13 Jan 2022 |
| Utility: APPARATUS FOR COOLING STEEL SHEET Filling date: 6 Sep 2025 Issue date: 13 Jan 2022 | 11 Jun 2019 | 13 Jan 2022 |
| Utility: Hot-rolled coated steel sheet with excellent workability and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 11 Jan 2022 | 23 Dec 2016 | 11 Jan 2022 |
| Utility: ULTRAHIGH-STRENGTH STEEL HAVING EXCELLENT COLD WORKABILITY AND SSC RESISTANCE, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 6 Jan 2022 | 29 Nov 2019 | 6 Jan 2022 |
| Utility: FILTERING PANEL AND PHOTOVOLTAIC MODULE INCLUDING SAME Filling date: 6 Sep 2025 Issue date: 6 Jan 2022 | 27 Nov 2019 | 6 Jan 2022 |
| Utility: DEVICE FOR MANUFACTURING MOLTEN IRON Filling date: 6 Sep 2025 Issue date: 6 Jan 2022 | 1 Nov 2019 | 6 Jan 2022 |
| Utility: CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, PREPARATION METHOD THEREFOR, AND LITHIUM SECONDARY BATTERY COMPRISING SAME Filling date: 6 Sep 2025 Issue date: 6 Jan 2022 | 27 Sep 2019 | 6 Jan 2022 |
| Utility: ELECTRICAL STEEL SHEET LAMINATE Filling date: 6 Sep 2025 Issue date: 6 Jan 2022 | 25 Sep 2019 | 6 Jan 2022 |
| Utility: Steel sheet for tool and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 4 Jan 2022 | 29 Jun 2016 | 4 Jan 2022 |
| Utility: STEEL MATERIAL HAVING LOW YIELD RATIO AND EXCELLENT HEAT AFFECTED ZONE TOUGHNESS AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 30 Dec 2021 | 25 Oct 2019 | 30 Dec 2021 |
| Utility: STEEL WIRE ROD ENABLING OMISSION OF SOFTENING HEAT TREATMENT AND METHOD OF MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 30 Dec 2021 | 18 Oct 2019 | 30 Dec 2021 |
| Utility: ANODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING SAME, AND LITHIUM SECONDARY BATTERY COMPRISING SAME Filling date: 6 Sep 2025 Issue date: 30 Dec 2021 | 13 Aug 2019 | 30 Dec 2021 |
| Utility: Multi-layered zinc alloy plated steel having excellent spot weldability and corrosion resistance Filling date: 6 Sep 2025 Issue date: 28 Dec 2021 | 22 Dec 2017 | 28 Dec 2021 |
| Utility: STEEL PLATE FOR PRESSURE VESSEL HAVING EXCELLENT HYDROGEN INDUCED CRACKING RESISTANCE AND METHOD OF MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 23 Dec 2021 | 29 Nov 2019 | 23 Dec 2021 |
| Utility: HOT PRESS-FORMED PART, AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 23 Dec 2021 | 20 Nov 2019 | 23 Dec 2021 |
| Utility: METHOD FOR WELDING A ZINC COATED STEEL SHEET Filling date: 6 Sep 2025 Issue date: 23 Dec 2021 | 8 Oct 2019 | 23 Dec 2021 |
| Utility: Molten material treatment apparatus Filling date: 6 Sep 2025 Issue date: 21 Dec 2021 | 12 Jul 2018 | 21 Dec 2021 |
| 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: 21 Dec 2021 | 21 Dec 2017 | 21 Dec 2021 |
| Utility: Ultra high strength hot-rolled steel sheet having excellent ductility and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 21 Dec 2021 | 21 Nov 2016 | 21 Dec 2021 |
| Utility: Ultra-high strength steel plate having excellent formability and hole-expandability, and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 21 Dec 2021 | 5 Oct 2016 | 21 Dec 2021 |
| Utility: HIGH STRENGTH STEEL PLATE FOR STRUCTURE WITH GOOD SEAWATER CORROSION RESISTANT PROPERTY AND METHOD OF MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 16 Dec 2021 | 8 Nov 2019 | 16 Dec 2021 |
| Utility: CRYOGENIC AUSTENITIC HIGH-MANGANESE STEEL HAVING EXCELLENT CORROSION RESISTANCE, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 16 Dec 2021 | 25 Oct 2019 | 16 Dec 2021 |
| Utility: SURFACE TREATMENT SOLUTION COMPOSITION CONTAINING TRIVALENT CHROMIUM AND INORGANIC COMPOUND, AND METHOD FOR MANUFACTURING HOT DIP GALVANIZED STEEL SHEET SURFACE-TREATED USING SAME Filling date: 6 Sep 2025 Issue date: 16 Dec 2021 | 17 Oct 2019 | 16 Dec 2021 |
| Utility: STEEL PLATE FOR PRESSURE VESSEL WITH EXCELLENT CRYOGENIC TOUGHNESS AND EXCELLENT DUCTILITY AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 16 Dec 2021 | 8 Oct 2019 | 16 Dec 2021 |
| Utility: Steel sheet for hot press formed member having excellent coating adhesion and manufacturing method for the same Filling date: 6 Sep 2025 Issue date: 14 Dec 2021 | 31 May 2018 | 14 Dec 2021 |
| Utility: FLASH BUTT WELDING MEMBER AND FLASH BUTT WELDING METHOD FOR PROVIDING WHEEL RIM WELD PART WITH EXCELLENT FORMABILITY Filling date: 6 Sep 2025 Issue date: 9 Dec 2021 | 25 Aug 2020 | 9 Dec 2021 |
| Utility: ZINC ALLOY-PLATED STEEL MATERIAL HAVING EXCELLENT CORROSION RESISTANCE AND SURFACE QUALITY, AND METHOD FOR PRODUCING SAME Filling date: 6 Sep 2025 Issue date: 9 Dec 2021 | 12 Dec 2019 | 9 Dec 2021 |
| Utility: DOUBLY ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 9 Dec 2021 | 25 Sep 2019 | 9 Dec 2021 |
| Utility: COATING COMPOSITION FOR ELECTRICAL STEEL SHEET, AND ELECTRICAL STEEL SHEET COMPRISING INSULATING COATING Filling date: 6 Sep 2025 Issue date: 9 Dec 2021 | 30 Jul 2019 | 9 Dec 2021 |
| Utility: METHOD FOR PRODUCING HIGH MANGANESE STEEL MATERIAL HAVING EXCELLENT ANTI-VIBRATION CHARACTERISTICS AND FORMABILITY, AND HIGH MANGANESE STEEL PRODUCED THEREBY Filling date: 6 Sep 2025 Issue date: 9 Dec 2021 | 10 Dec 2018 | 9 Dec 2021 |
| Utility: Zinc alloy plated steel having excellent weldability and corrosion resistance Filling date: 6 Sep 2025 Issue date: 7 Dec 2021 | 21 Dec 2017 | 7 Dec 2021 |
| Utility: Ultra-high strength steel sheet having excellent bendability and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 7 Dec 2021 | 7 Dec 2017 | 7 Dec 2021 |
| Utility: HIGH-STRENGTH FERRITIC STAINLESS STEEL FOR CLAMP AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 2 Dec 2021 | 8 Oct 2019 | 2 Dec 2021 |
| Utility: POSITIVE POLE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND MANUFACTURING METHOD THEREOF, LITHIUM SECONDARY BATTERY Filling date: 6 Sep 2025 Issue date: 2 Dec 2021 | 18 Dec 2018 | 2 Dec 2021 |
| Utility: Hot rolled steel sheet having excellent strength and elongation Filling date: 6 Sep 2025 Issue date: 30 Nov 2021 | 12 Apr 2018 | 30 Nov 2021 |
| Utility: Apparatus and method for controlling concentration of oxygen in heating furnace Filling date: 6 Sep 2025 Issue date: 30 Nov 2021 | 20 Dec 2017 | 30 Nov 2021 |
| Utility: STEEL SHEET FOR HOT PRESS FORMED MEMBER HAVING EXCELLENT PAINTING ADHESION AND POST-PAINTING CORROSION RESISTANCE, AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 25 Nov 2021 | 5 Aug 2021 | 25 Nov 2021 |
| Utility: Grain-oriented electrical steel plate and production method therefor Filling date: 6 Sep 2025 Issue date: 23 Nov 2021 | 21 Dec 2015 | 23 Nov 2021 |
| Utility: NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 18 Nov 2021 | 27 Sep 2019 | 18 Nov 2021 |
| Utility: Annealing separator composition for oriented electrical steel sheet, oriented electrical steel sheet, and method for manufacturing oriented electrical steel sheet Filling date: 6 Sep 2025 Issue date: 16 Nov 2021 | 20 Dec 2017 | 16 Nov 2021 |
| Utility: PLATING WEIGHT CONTROL DEVICE AND CONTROL METHOD Filling date: 6 Sep 2025 Issue date: 11 Nov 2021 | 20 Sep 2019 | 11 Nov 2021 |
