| Utility: Wire rod having excellent cold forgeability and manufacturing method therefor Filling date: 7 Sep 2025 Issue date: 27 Apr 2021 | 11 Nov 2016 | 27 Apr 2021 |
| Utility: Hot-dip galvanized steel plate with excellent bake hardenability and anti-aging property at room temperature Filling date: 7 Sep 2025 Issue date: 20 Apr 2021 | 8 Nov 2017 | 20 Apr 2021 |
| Utility: Hot-rolled galvanized steel sheet having excellent galling resistance, formability and sealer-adhesion property and method for manufacturing same Filling date: 7 Sep 2025 Issue date: 20 Apr 2021 | 22 Aug 2017 | 20 Apr 2021 |
| Utility: Ultra-high strength steel sheet having excellent phosphatability and bendability Filling date: 7 Sep 2025 Issue date: 13 Apr 2021 | 7 Dec 2016 | 13 Apr 2021 |
| Utility: High-manganese hot-dip aluminum-coated steel sheet having excellent coating adhesion Filling date: 7 Sep 2025 Issue date: 6 Apr 2021 | 23 Dec 2016 | 6 Apr 2021 |
| Utility: Cooling device and cooling method Filling date: 7 Sep 2025 Issue date: 6 Apr 2021 | 27 Jul 2016 | 6 Apr 2021 |
| Utility: LITHIUM-ADSORPTIVE MOLDED OBJECT AND MANUFACTURING METHOD THEREFOR Filling date: 7 Sep 2025 Issue date: 1 Apr 2021 | 23 Apr 2019 | 1 Apr 2021 |
| Utility: Non-magnetic steel material having excellent hot workability and manufacturing method therefor Filling date: 7 Sep 2025 Issue date: 30 Mar 2021 | 23 Dec 2016 | 30 Mar 2021 |
| Utility: HOT-ROLLED STEEL SHEET HAVING EXCELLENT EXPANDABILITY AND METHOD FOR MANUFACTURING SAME Filling date: 7 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: 7 Sep 2025 Issue date: 25 Mar 2021 | 6 Sep 2018 | 25 Mar 2021 |
| Utility: MAGNESIUM ALLOY SHEET AND METHOD FOR PRODUCING SAME Filling date: 7 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: 7 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: 7 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: 7 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: 7 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: 7 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: 7 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: 7 Sep 2025 Issue date: 11 Mar 2021 | 20 Nov 2018 | 11 Mar 2021 |
| Utility: Cold-rolled steel sheet with excellent formability, galvanized steel sheet, and manufacturing method thereof Filling date: 7 Sep 2025 Issue date: 9 Mar 2021 | 24 Jul 2019 | 9 Mar 2021 |
| Utility: High tensile strength steel having excellent bendability and stretch-flangeability and manufacturing method thereof Filling date: 7 Sep 2025 Issue date: 9 Mar 2021 | 7 Dec 2017 | 9 Mar 2021 |
| Utility: Non-oriented electrical steel sheet and method for manufacturing the same Filling date: 7 Sep 2025 Issue date: 9 Mar 2021 | 21 Dec 2015 | 9 Mar 2021 |
| Utility: Steel Material Showing Excellent Hydrogen-Induced Cracking Resistance and Method for Preparing Same Filling date: 7 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: 7 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: 7 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: 7 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: 7 Sep 2025 Issue date: 4 Mar 2021 | 13 Dec 2018 | 4 Mar 2021 |
| Utility: METAL SURFACE TREATMENT COMPOSITION HAVING EXCELLENT SLIP RESISTANCE, AND METAL MATERIAL TO WHICH SAME IS APPLIED Filling date: 7 Sep 2025 Issue date: 4 Mar 2021 | 11 Dec 2018 | 4 Mar 2021 |
| Utility: HIGH-STRENGTH HIGH-TOUGHNESS HOT-ROLLED STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 7 Sep 2025 Issue date: 4 Mar 2021 | 17 Sep 2018 | 4 Mar 2021 |
| Utility: NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PREPARING SAME Filling date: 7 Sep 2025 Issue date: 4 Mar 2021 | 10 Sep 2018 | 4 Mar 2021 |
| Utility: ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PREPARING SAME Filling date: 7 Sep 2025 Issue date: 4 Mar 2021 | 17 May 2018 | 4 Mar 2021 |
| Utility: NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PREPARING SAME Filling date: 7 Sep 2025 Issue date: 4 Mar 2021 | 16 May 2018 | 4 Mar 2021 |
| Utility: NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PRODUCING SAME Filling date: 7 Sep 2025 Issue date: 4 Mar 2021 | 16 May 2018 | 4 Mar 2021 |
| Utility: Plated steel sheet for hot press forming having excellent impact property, hot press formed part, and manufacturing method thereof Filling date: 7 Sep 2025 Issue date: 2 Mar 2021 | 15 Dec 2017 | 2 Mar 2021 |
| Utility: GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 7 Sep 2025 Issue date: 25 Feb 2021 | 17 Dec 2018 | 25 Feb 2021 |
| Utility: DOUBLE ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME Filling date: 7 Sep 2025 Issue date: 25 Feb 2021 | 17 Dec 2018 | 25 Feb 2021 |
| Utility: METHOD FOR PRODUCING ORIENTED ELECTRICAL STEEL SHEET WITH ULTRA-LOW IRON LOSS Filling date: 7 Sep 2025 Issue date: 25 Feb 2021 | 6 Dec 2018 | 25 Feb 2021 |
| Utility: HOT-ROLLED STEEL SHEET WITH EXCELLENT LOW-TEMPERATURE TOUGHNESS, STEEL PIPE, AND MANUFACTURING METHOD THEREFOR Filling date: 7 Sep 2025 Issue date: 25 Feb 2021 | 4 Oct 2018 | 25 Feb 2021 |
| Utility: Adhesive laminate core manufacturing apparatus and core laminator therefor Filling date: 7 Sep 2025 Issue date: 16 Feb 2021 | 16 Jun 2016 | 16 Feb 2021 |
| Utility: Vertical semi-continuous casting equipment and vertical semi-continuous casting method Filling date: 7 Sep 2025 Issue date: 9 Feb 2021 | 23 Oct 2015 | 9 Feb 2021 |
| Utility: PHOTOVOLTAIC POWER GENERATION MODULE Filling date: 7 Sep 2025 Issue date: 4 Feb 2021 | 7 Dec 2018 | 4 Feb 2021 |
| Utility: Ultra high-strength and high-ductility steel sheet having excellent yield ratio and manufacturing method therefor Filling date: 7 Sep 2025 Issue date: 2 Feb 2021 | 20 Apr 2017 | 2 Feb 2021 |
| Utility: Grain-oriented electrical steel sheet and manufacturing method therefor Filling date: 7 Sep 2025 Issue date: 2 Feb 2021 | 22 Dec 2016 | 2 Feb 2021 |
| Utility: Plated steel material having excellent friction resistance and white rust resistance and method for preparing same Filling date: 7 Sep 2025 Issue date: 2 Feb 2021 | 16 Dec 2016 | 2 Feb 2021 |
| Utility: Hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet with excellent aging resistance properties and bake hardenability, and method for manufacturing same Filling date: 7 Sep 2025 Issue date: 2 Feb 2021 | 16 Jun 2016 | 2 Feb 2021 |
| Utility: High-strength hot-dip galvanized steel sheet having excellent surface quality and spot weldability Filling date: 7 Sep 2025 Issue date: 26 Jan 2021 | 13 Dec 2016 | 26 Jan 2021 |
| Utility: LITHIUM TITANIUM COMPOSITE OXIDE COMPRISING ALUMINUM-COATED PRIMARY PARTICLES AND MANUFACTURING METHOD THEREFOR Filling date: 7 Sep 2025 Issue date: 21 Jan 2021 | 12 Mar 2019 | 21 Jan 2021 |
| Utility: DEPOSITION APPARATUS AND DEPOSITION METHOD Filling date: 7 Sep 2025 Issue date: 21 Jan 2021 | 19 Oct 2018 | 21 Jan 2021 |
| Utility: PLATING STEEL SHEET FOR HOT PRESS FORMING, FORMING MEMBER USING SAME, AND MANUFACTURING METHOD THEREFOR Filling date: 7 Sep 2025 Issue date: 14 Jan 2021 | 21 Dec 2018 | 14 Jan 2021 |
| Utility: ZINC ALLOY-PLATED STEEL HAVING EXCELLENT CORROSION RESISTANCE AND SURFACE SMOOTHNESS, AND MANUFACTURING METHOD THEREFOR Filling date: 7 Sep 2025 Issue date: 14 Jan 2021 | 20 Dec 2018 | 14 Jan 2021 |
| Utility: ZINC ALLOY PLATED STEEL MATERIAL HAVING EXCELLENT SURFACE QUALITY AND CORROSION RESISTANCE, AND METHOD FOR MANUFACTURING SAME Filling date: 7 Sep 2025 Issue date: 14 Jan 2021 | 13 Dec 2018 | 14 Jan 2021 |
