| Utility: ALUMINUM-ZINC ALLOY PLATED STEEL SHEET HAVING EXCELLENT HOT WORKABILITY AND CORROSION RESISTANCE, AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 11 Nov 2021 | 23 Aug 2019 | 11 Nov 2021 |
| Utility: FERRITE-BASED STAINLESS STEEL HAVING EXCELLENT PROCESSABILITY AND HIGH-TEMPERATURE STRENGTH AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 11 Nov 2021 | 22 Aug 2019 | 11 Nov 2021 |
| Utility: COATING WEIGHT CONTROL APPARATUS AND COATING WEIGHT CONTROL METHOD Filling date: 6 Sep 2025 Issue date: 11 Nov 2021 | 21 Aug 2019 | 11 Nov 2021 |
| Utility: COMPOSITION FOR SURFACE TREATMENT OF MG-CONTAINING GALVANIZED STEEL SHEET AND MG-CONTAINING GALVANIZED STEEL SHEET SURFACE-TREATED USING SAME Filling date: 6 Sep 2025 Issue date: 11 Nov 2021 | 16 Aug 2019 | 11 Nov 2021 |
| Utility: Aluminum-based plated steel having excellent corrosion resistance, aluminum-based alloy plated steel using the same, and method of manufacturing thereof Filling date: 6 Sep 2025 Issue date: 9 Nov 2021 | 21 Dec 2017 | 9 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: 9 Nov 2021 | 20 Dec 2017 | 9 Nov 2021 |
| Utility: Apparatus and method for feeding material Filling date: 6 Sep 2025 Issue date: 9 Nov 2021 | 24 Aug 2017 | 9 Nov 2021 |
| Utility: Plated steel sheet having fine and even plating structure Filling date: 6 Sep 2025 Issue date: 9 Nov 2021 | 23 Dec 2016 | 9 Nov 2021 |
| Utility: NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 4 Nov 2021 | 25 Sep 2019 | 4 Nov 2021 |
| Utility: HIGHLY CORROSION-RESISTANT PLATED STEEL SHEET HAVING EXCELLENT PLATING ADHESION AND RESISTANCE TO LIQUID METAL EMBRITTLEMENT Filling date: 6 Sep 2025 Issue date: 4 Nov 2021 | 20 Sep 2019 | 4 Nov 2021 |
| Utility: WELDED MEMBER FOR PLATED STEEL PLATE EXCELLENT IN WELD ZONE POROSITY RESISTANCE AND FATIGUE PROPERTIES AND METHOD FOR MANUFACTURING THE SAME Filling date: 6 Sep 2025 Issue date: 4 Nov 2021 | 18 Jun 2018 | 4 Nov 2021 |
| Utility: Non-oriented electrical steel sheet and method for producing same Filling date: 6 Sep 2025 Issue date: 2 Nov 2021 | 20 Dec 2017 | 2 Nov 2021 |
| Utility: APPARATUS FOR COOLING HOT-DIP PLATED STEEL SHEET Filling date: 6 Sep 2025 Issue date: 28 Oct 2021 | 14 Oct 2019 | 28 Oct 2021 |
| Utility: Enhanced wear resistant steel and methods of making the same Filling date: 6 Sep 2025 Issue date: 26 Oct 2021 | 11 May 2018 | 26 Oct 2021 |
| Utility: Pressure vessel steel having excellent hydrogen induced cracking resistance, and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 26 Oct 2021 | 3 Nov 2017 | 26 Oct 2021 |
| Utility: WIRE ROD FOR COLD HEADING, PROCESSED PRODUCT USING SAME, AND MANUFACTURING METHODS THEREFOR Filling date: 6 Sep 2025 Issue date: 21 Oct 2021 | 29 Aug 2019 | 21 Oct 2021 |
| Utility: Magnesium alloy plate and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 19 Oct 2021 | 21 Dec 2017 | 19 Oct 2021 |
| Utility: High-strength and high-manganese steel having excellent low-temperature toughness and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 19 Oct 2021 | 19 Oct 2017 | 19 Oct 2021 |
| Utility: ULTRA HIGH STRENGTH AND HIGH DUCTILITY STEEL SHEET HAVING EXCELLENT YIELD RATIO AND MANUFACTURING METHOD FOR SAME Filling date: 6 Sep 2025 Issue date: 14 Oct 2021 | 3 Sep 2019 | 14 Oct 2021 |
| Utility: GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR REFINING MAGNETIC DOMAIN OF SAME Filling date: 6 Sep 2025 Issue date: 14 Oct 2021 | 23 May 2019 | 14 Oct 2021 |
| Utility: Roller assembly, casting apparatus, and roller separating method for same Filling date: 6 Sep 2025 Issue date: 12 Oct 2021 | 8 Aug 2018 | 12 Oct 2021 |
| Utility: Steel sheet for hot press formed member having excellent painting adhesion and post-painting corrosion resistance Filling date: 6 Sep 2025 Issue date: 12 Oct 2021 | 31 May 2018 | 12 Oct 2021 |
| Utility: Steel for pipes having high fatigue resistance, method of manufacturing the same, and welded steel pipe using the same Filling date: 6 Sep 2025 Issue date: 12 Oct 2021 | 11 Sep 2017 | 12 Oct 2021 |
| Utility: TI- AND NB-ADDED FERRITIC STAINLESS STEEL EXCELLENT IN LOW-TEMPERATURE TOUGHNESS OF WELDS Filling date: 6 Sep 2025 Issue date: 7 Oct 2021 | 2 Nov 2018 | 7 Oct 2021 |
| Utility: Zn-Mg alloy plated steel material having excellent corrosion resistance and plating adhesion Filling date: 6 Sep 2025 Issue date: 5 Oct 2021 | 22 Dec 2017 | 5 Oct 2021 |
| Utility: High-strength steel material having excellent low-temperature strain aging impact properties and welding heat-affected zone impact properties and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 5 Oct 2021 | 15 Dec 2016 | 5 Oct 2021 |
| Utility: Wire rod having excellent low temperature impact toughness and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 5 Oct 2021 | 18 Nov 2016 | 5 Oct 2021 |
| Utility: STEEL FOR PRESSURE VESSEL HAVING EXCELLENT SURFACE QUALITY AND IMPACT TOUGHNESS, AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 30 Sep 2021 | 2 Aug 2019 | 30 Sep 2021 |
| Utility: MANUFACTURING APPARATUS FOR LITHIUM SULFATE AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 30 Sep 2021 | 2 Aug 2019 | 30 Sep 2021 |
| Utility: METHOD AND APPARATUS FOR REUSING WASTEWATER BY USING REVERSE OSMOSIS Filling date: 6 Sep 2025 Issue date: 30 Sep 2021 | 18 Jul 2019 | 30 Sep 2021 |
| Utility: COOLING APPARATUS Filling date: 6 Sep 2025 Issue date: 30 Sep 2021 | 4 Apr 2017 | 30 Sep 2021 |
| Utility: Field dissimilar metal welding technology for enhanced wear resistant high manganese steel Filling date: 6 Sep 2025 Issue date: 28 Sep 2021 | 2 May 2017 | 28 Sep 2021 |
| Utility: HIGH-STRENGTH COLD ROLLED STEEL SHEET WITH LOW MATERIAL NON-UNIFORMITY AND EXCELLENT FORMABILITY, HOT DIPPED GALVANIZED STEEL SHEET, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 23 Sep 2021 | 4 Jun 2021 | 23 Sep 2021 |
| Utility: AUSTENITIC STAINLESS STEEL HAVING IMPROVED STRENGTH Filling date: 6 Sep 2025 Issue date: 23 Sep 2021 | 8 Aug 2019 | 23 Sep 2021 |
| Utility: LOW-DENSITY CLAD STEEL SHEET HAVING EXCELLENT STRENGTH AND PLATEABILITY, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 23 Sep 2021 | 25 Jul 2019 | 23 Sep 2021 |
| Utility: METHOD FOR PRODUCING LITHIUM CHLORIDE, AND LITHIUM CARBONATE Filling date: 6 Sep 2025 Issue date: 23 Sep 2021 | 19 Jun 2017 | 23 Sep 2021 |
| Utility: MANUFACTURING METHOD OF SURFACE-TREATED ZINC-NICKEL ALLOY ELECTROPLATED STEEL SHEET HAVING EXCELLENT CORROSION RESISTIVITY AND PAINTABILITY Filling date: 6 Sep 2025 Issue date: 16 Sep 2021 | 28 Jun 2019 | 16 Sep 2021 |
| Utility: WIRE ROD WITH EXCELLENT STRENGTH AND DUCTILITY AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 16 Sep 2021 | 23 Nov 2017 | 16 Sep 2021 |
| Utility: LITHIUM-TITANIUM COMPLEX OXIDE, PREPARATION METHOD THEREOF, AND LITHIUM SECONDARY BATTERY COMPRISING SAME Filling date: 6 Sep 2025 Issue date: 16 Sep 2021 | 26 May 2017 | 16 Sep 2021 |
| Utility: Non-oriented electrical steel sheet and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 7 Sep 2021 | 19 Dec 2017 | 7 Sep 2021 |
| Utility: Method and apparatus for ultrasensitive quantification of microRNA using an atomic force microscope and a hybrid binding domain Filling date: 6 Sep 2025 Issue date: 7 Sep 2021 | 22 Jan 2017 | 7 Sep 2021 |
| 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: High yield ratio type high-strength cold-rolled steel sheet and manufacturing method thereof Filling date: 6 Sep 2025 Issue date: 31 Aug 2021 | 19 Dec 2016 | 31 Aug 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 |
