| Utility: HIGH-STRENGTH STEEL SHEET HAVING EXCELLENT IMPACT RESISTANT PROPERTY AND METHOD FOR MANUFACTURING THEREOF Filling date: 6 Sep 2025 Issue date: 2 Sep 2021 | 24 Jul 2019 | 2 Sep 2021 |
| Utility: METHOD FOR MANUFACTURING STAINLESS STEEL FOR POLYMER FUEL CELL SEPARATOR HAVING EXCELLENT CONTACT RESISTANCE Filling date: 6 Sep 2025 Issue date: 2 Sep 2021 | 20 Jun 2018 | 2 Sep 2021 |
| Utility: GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 26 Aug 2021 | 12 May 2021 | 26 Aug 2021 |
| Utility: COMPOSITION FOR WASHING PICKLED STEEL PLATE, METHOD FOR WASHING PICKLED STEEL PLATE BY USING SAME, AND STEEL PLATE OBTAINED THEREBY Filling date: 6 Sep 2025 Issue date: 26 Aug 2021 | 11 May 2021 | 26 Aug 2021 |
| Utility: ALLOY STEEL MANUFACTURING METHOD Filling date: 6 Sep 2025 Issue date: 26 Aug 2021 | 15 Jul 2019 | 26 Aug 2021 |
| Utility: LOW-DENSITY CLAD STEEL SHEET HAVING EXCELLENT FORMABILITY AND FATIGUE PROPERTY AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 26 Aug 2021 | 8 Jul 2019 | 26 Aug 2021 |
| Utility: COMPOSITION FOR STEEL SHEET SURFACE COATING AND STEEL SHEET SURFACE-COATED WITH SAME Filling date: 6 Sep 2025 Issue date: 19 Aug 2021 | 7 Aug 2019 | 19 Aug 2021 |
| Utility: AUSTENITIC STAINLESS STEEL HAVING EXCELLENT ELECTRICAL CONDUCTIVITY, AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 19 Aug 2021 | 14 Jun 2019 | 19 Aug 2021 |
| Utility: AL-FE-ALLOY PLATED STEEL SHEET FOR HOT FORMING, HAVING EXCELLENT TWB WELDING CHARACTERISTICS, HOT FORMING MEMBER, AND MANUFACTURING METHODS THEREFOR Filling date: 6 Sep 2025 Issue date: 22 Jul 2021 | 31 May 2018 | 22 Jul 2021 |
| Utility: ALLOY-COATED STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 15 Jul 2021 | 30 Mar 2021 | 15 Jul 2021 |
| Utility: GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET Filling date: 6 Sep 2025 Issue date: 1 Jul 2021 | 22 Dec 2016 | 1 Jul 2021 |
| Utility: AUSTENITIC STEEL MATERIAL HAVING EXCELLENT HOT WORKABILITY AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 24 Jun 2021 | 9 Mar 2021 | 24 Jun 2021 |
| Utility: BLACK PLATED STEEL SHEET AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 24 Jun 2021 | 21 Dec 2020 | 24 Jun 2021 |
| Utility: WIRE ROD AND STEEL WIRE FOR SPRING, HAVING ENHANCED TOUGHNESS AND CORROSION FATIGUE PROPERTIES, AND RESPECTIVE MANUFACTURING METHODS THEREFOR Filling date: 6 Sep 2025 Issue date: 17 Jun 2021 | 22 Feb 2019 | 17 Jun 2021 |
| Utility: HOT DIP PLATED STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE AND WORKABILITY, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 17 Jun 2021 | 10 Dec 2018 | 17 Jun 2021 |
| Utility: ULTRAHIGH-STRENGTH AND HIGH-DUCTILITY STEEL SHEET HAVING EXCELLENT COLD FORMABILITY, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 17 Jun 2021 | 17 Sep 2018 | 17 Jun 2021 |
| Utility: METHOD FOR PREVENTING SPOT WELDING CRACK OF GALVANIZED STEEL PLATE Filling date: 6 Sep 2025 Issue date: 10 Jun 2021 | 13 Dec 2018 | 10 Jun 2021 |
| Utility: INSULATION FILM COMPOSITION FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET, METHOD FOR FORMING INSULATION FILM FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET USING SAME, AND GRAIN-ORIENTED ELECTRICAL STEEL SHEET Filling date: 6 Sep 2025 Issue date: 10 Jun 2021 | 22 Dec 2016 | 10 Jun 2021 |
| Utility: HOT ROLLED COATED STEEL SHEET HAVING HIGH STRENGTH, HIGH FORMABILITY, EXCELLENT BAKE HARDENABILITY AND METHOD OF MANFUACTURING SAME Filling date: 6 Sep 2025 Issue date: 3 Jun 2021 | 8 Jul 2019 | 3 Jun 2021 |
| Utility: WEAR-RESISTANT STEEL HAVING EXCELLENT HARDNESS AND IMPACT TOUGHNESS, AND METHOD FOR PRODUCING SAME Filling date: 6 Sep 2025 Issue date: 3 Jun 2021 | 21 Dec 2018 | 3 Jun 2021 |
| Utility: STEEL MATERIAL HAVING EXCELLENT WEAR RESISTANCE AND MANUFACTURING METHOD Filling date: 6 Sep 2025 Issue date: 3 Jun 2021 | 20 Dec 2018 | 3 Jun 2021 |
| Utility: HIGH-STRENGTH HOT-ROLLED STEEL SHEET HAVING EXCELLENT BENDABILITY AND LOW-TEMPERATURE AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 3 Jun 2021 | 22 Nov 2018 | 3 Jun 2021 |
| Utility: METHOD FOR PREPARING CATHODE ACTIVE MATERIAL PRECURSOR FOR SECONDARY BATTERY, AND PREPARATION APPARATUS USING SAME Filling date: 6 Sep 2025 Issue date: 3 Jun 2021 | 19 Jun 2018 | 3 Jun 2021 |
| Utility: POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM ION BATTERY, PREPARING METHOD OF THE SAME, AND RECHARGEABLE LITHIUM ION BATTERY COMPRISING THE SAME Filling date: 6 Sep 2025 Issue date: 27 May 2021 | 24 Nov 2020 | 27 May 2021 |
| Utility: MAGNESIUM ALLOY SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 20 May 2021 | 21 Jun 2018 | 20 May 2021 |
| Utility: FERRITIC STAINLESS STEEL HAVING REDUCED CARBON SLUDGE ADSORPTION FOR EXHAUST SYSTEM HEAT EXCHANGER AND METHOD OF MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 20 May 2021 | 22 Nov 2016 | 20 May 2021 |
| Utility: PLATED STEEL SHEET FOR HOT PRESS FORMING HAVING EXCELLENT IMPACT PROPERTY, HOT PRESS FORMED PART, AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 13 May 2021 | 21 Jan 2021 | 13 May 2021 |
| Utility: MAGNESIUM ALLOY SHEET AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 13 May 2021 | 3 Dec 2018 | 13 May 2021 |
| Utility: METHOD FOR PRODUCING NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME Filling date: 6 Sep 2025 Issue date: 13 May 2021 | 1 Aug 2018 | 13 May 2021 |
| Utility: METHOD FOR RECOVERING NICKEL AND COBALT FROM NICKEL, IRON, AND COBALT-CONTAINING RAW MATERIAL Filling date: 6 Sep 2025 Issue date: 6 May 2021 | 22 Dec 2017 | 6 May 2021 |
| Utility: SIDE TRIMMING DEVICE Filling date: 6 Sep 2025 Issue date: 6 May 2021 | 22 Dec 2017 | 6 May 2021 |
| Utility: GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 6 May 2021 | 20 Dec 2017 | 6 May 2021 |
| Utility: METHOD FOR REFINING MAGNETIC DOMAINS OF GRAIN-ORIENTED ELECTRICAL STEEL SHEET Filling date: 6 Sep 2025 Issue date: 6 May 2021 | 20 Dec 2017 | 6 May 2021 |
| Utility: GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 6 May 2021 | 20 Dec 2017 | 6 May 2021 |
| Utility: LITHIUM-ADSORPTIVE MOLDED OBJECT AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 1 Apr 2021 | 23 Apr 2019 | 1 Apr 2021 |
| Utility: HOT-ROLLED STEEL SHEET HAVING EXCELLENT EXPANDABILITY AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 25 Mar 2021 | 15 Nov 2018 | 25 Mar 2021 |
| Utility: FERRITIC STAINLESS STEEL HAVING EXCELLENT HIGH-TEMPERATURE OXIDATION RESISTANCE, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 25 Mar 2021 | 6 Sep 2018 | 25 Mar 2021 |
| Utility: MAGNESIUM ALLOY SHEET AND METHOD FOR PRODUCING SAME Filling date: 6 Sep 2025 Issue date: 18 Mar 2021 | 21 Dec 2018 | 18 Mar 2021 |
| Utility: COMPOSITE MATERIAL IN WHICH STEEL SHEET AND PLASTIC LAYER HAVING FUNCTIONAL GROUP INTRODUCED THEREIN ARE LAMINATED, AND METHOD FOR PRODUCING SAME Filling date: 6 Sep 2025 Issue date: 18 Mar 2021 | 17 Oct 2018 | 18 Mar 2021 |
| Utility: WIRE ROD FOR COLD HEADING, PROCESSED PRODUCT USING SAME, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 18 Mar 2021 | 10 Oct 2018 | 18 Mar 2021 |
| Utility: GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 11 Mar 2021 | 17 Dec 2018 | 11 Mar 2021 |
| Utility: ADHESIVE COATING COMPOSITION FOR ELECTRICAL STEEL SHEET, ELECTRICAL STEEL SHEET LAMINATE AND METHOD FOR MANUFACTURING ELECTRICAL STEEL SHEET PRODUCT Filling date: 6 Sep 2025 Issue date: 11 Mar 2021 | 17 Dec 2018 | 11 Mar 2021 |
| Utility: STRUCTURAL STEEL HAVING EXCELLENT BRITTLE CRACK PROPAGATION RESISTANCE, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 11 Mar 2021 | 30 Nov 2018 | 11 Mar 2021 |
| Utility: STEEL SHEET WITH EXCELLENT BAKE HARDENING PROPERTIES AND PLATING ADHESION AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 11 Mar 2021 | 30 Nov 2018 | 11 Mar 2021 |
| Utility: HIGH YIELD RATIO-TYPE HIGH-STRENGTH STEEL SHEET AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 11 Mar 2021 | 20 Nov 2018 | 11 Mar 2021 |
| Utility: Steel Material Showing Excellent Hydrogen-Induced Cracking Resistance and Method for Preparing Same Filling date: 6 Sep 2025 Issue date: 4 Mar 2021 | 24 Dec 2018 | 4 Mar 2021 |
| Utility: COLD-ROLLED STEEL SHEET HAVING EXCELLENT HIGH-TEMPERATURE PROPERTIES AND ROOM-TEMPERATURE WORKABILITY, AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 4 Mar 2021 | 18 Dec 2018 | 4 Mar 2021 |
| Utility: GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND MAGNETIC DOMAIN REFINING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 4 Mar 2021 | 17 Dec 2018 | 4 Mar 2021 |
| Utility: HOT-ROLLED STEEL SHEET HAVING EXCELLENT IMPACT RESISTANCE, STEEL PIPE, MEMBER, AND MANUFACTURING METHODS THEREFOR Filling date: 6 Sep 2025 Issue date: 4 Mar 2021 | 14 Dec 2018 | 4 Mar 2021 |
| Utility: METHOD FOR PRODUCING ORIENTED ELECTRICAL STEEL SHEET WITH ULTRA-LOW IRON LOSS Filling date: 6 Sep 2025 Issue date: 4 Mar 2021 | 13 Dec 2018 | 4 Mar 2021 |
