| Utility: Hot dip aluminized steel material having excellent corrosion resistance and workability, and manufacturing method therefor Filling date: 6 Nov 2025 Issue date: 17 Aug 2021 | 22 Dec 2017 | 17 Aug 2021 |
| Utility: Magnesium alloy sheet and manufacturing method thereof Filling date: 6 Nov 2025 Issue date: 17 Aug 2021 | 12 Dec 2017 | 17 Aug 2021 |
| Utility: High strength cold-rolled steel sheet and hot-dip galvanized steel sheet having excellent hole expansion, ductility and surface treatment properties, and method for manufacturing same Filling date: 6 Nov 2025 Issue date: 17 Aug 2021 | 20 Dec 2016 | 17 Aug 2021 |
| Utility: Hot-dip galvanized steel sheet with excellent surface quality and resistance to low temperature brittle fracture Filling date: 6 Nov 2025 Issue date: 3 Aug 2021 | 22 Dec 2016 | 3 Aug 2021 |
| Utility: Method and device for magnetic domain refinement of oriented electrical steel plate Filling date: 6 Nov 2025 Issue date: 27 Jul 2021 | 26 Dec 2016 | 27 Jul 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 Nov 2025 Issue date: 22 Jul 2021 | 31 May 2018 | 22 Jul 2021 |
| Utility: Method for refining magnetic domains of grain-oriented electrical steel plates, and apparatus therefor Filling date: 6 Nov 2025 Issue date: 20 Jul 2021 | 18 Jan 2017 | 20 Jul 2021 |
| Utility: Method for manufacturing grain-oriented electrical steel sheet Filling date: 6 Nov 2025 Issue date: 20 Jul 2021 | 20 Dec 2016 | 20 Jul 2021 |
| Utility: Resin composition, black resin coated steel sheet using same, and method of preparing same Filling date: 6 Nov 2025 Issue date: 20 Jul 2021 | 9 Dec 2016 | 20 Jul 2021 |
| Utility: ALLOY-COATED STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Nov 2025 Issue date: 15 Jul 2021 | 30 Mar 2021 | 15 Jul 2021 |
| Utility: Non-oriented electrical steel sheet and manufacturing method therefor Filling date: 6 Nov 2025 Issue date: 13 Jul 2021 | 19 Dec 2017 | 13 Jul 2021 |
| Utility: Non-oriented electrical steel sheet and manufacturing method therefor Filling date: 6 Nov 2025 Issue date: 13 Jul 2021 | 19 Dec 2017 | 13 Jul 2021 |
| Utility: Hot dip coated steel having excellent processability Filling date: 6 Nov 2025 Issue date: 13 Jul 2021 | 19 Dec 2017 | 13 Jul 2021 |
| Utility: Method for refining magnetic domains of grain-oriented electrical steel plates, and apparatus therefor Filling date: 6 Nov 2025 Issue date: 13 Jul 2021 | 23 Dec 2016 | 13 Jul 2021 |
| Utility: Directional electric steel plate having excellent magnetic properties and manufacturing method thereof Filling date: 6 Nov 2025 Issue date: 13 Jul 2021 | 21 Dec 2015 | 13 Jul 2021 |
| Utility: GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET Filling date: 6 Nov 2025 Issue date: 1 Jul 2021 | 22 Dec 2016 | 1 Jul 2021 |
| Utility: Stainless steel for polymer fuel cell separator and method for preparing same Filling date: 6 Nov 2025 Issue date: 29 Jun 2021 | 8 Feb 2016 | 29 Jun 2021 |
| Utility: AUSTENITIC STEEL MATERIAL HAVING EXCELLENT HOT WORKABILITY AND MANUFACTURING METHOD THEREFOR Filling date: 6 Nov 2025 Issue date: 24 Jun 2021 | 9 Mar 2021 | 24 Jun 2021 |
| Utility: BLACK PLATED STEEL SHEET AND MANUFACTURING METHOD THEREOF Filling date: 6 Nov 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 Nov 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 Nov 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 Nov 2025 Issue date: 17 Jun 2021 | 17 Sep 2018 | 17 Jun 2021 |
| Utility: High manganese hot dip aluminum-plated steel sheet having excellent sacrificial corrosion resistance and platability and manufacturing method therefor Filling date: 6 Nov 2025 Issue date: 15 Jun 2021 | 21 Dec 2017 | 15 Jun 2021 |
| Utility: METHOD FOR PREVENTING SPOT WELDING CRACK OF GALVANIZED STEEL PLATE Filling date: 6 Nov 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 Nov 2025 Issue date: 10 Jun 2021 | 22 Dec 2016 | 10 Jun 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 Nov 2025 Issue date: 8 Jun 2021 | 19 Dec 2016 | 8 Jun 2021 |
| Utility: Grain-oriented electrical steel sheet and manufacturing method therefor Filling date: 6 Nov 2025 Issue date: 8 Jun 2021 | 8 Dec 2014 | 8 Jun 2021 |
| Utility: HOT ROLLED COATED STEEL SHEET HAVING HIGH STRENGTH, HIGH FORMABILITY, EXCELLENT BAKE HARDENABILITY AND METHOD OF MANFUACTURING SAME Filling date: 6 Nov 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 Nov 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 Nov 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 Nov 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 Nov 2025 Issue date: 3 Jun 2021 | 19 Jun 2018 | 3 Jun 2021 |
| Utility: Triple-phase stainless steel and method for producing same Filling date: 6 Nov 2025 Issue date: 1 Jun 2021 | 30 Aug 2016 | 1 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 Nov 2025 Issue date: 27 May 2021 | 24 Nov 2020 | 27 May 2021 |
| Utility: MAGNESIUM ALLOY SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Nov 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 Nov 2025 Issue date: 20 May 2021 | 22 Nov 2016 | 20 May 2021 |
| Utility: Preparation method of lithium-titanium complex oxide according to particle size control of slurry through wet-milling Filling date: 6 Nov 2025 Issue date: 18 May 2021 | 26 May 2017 | 18 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 Nov 2025 Issue date: 13 May 2021 | 21 Jan 2021 | 13 May 2021 |
| Utility: MAGNESIUM ALLOY SHEET AND MANUFACTURING METHOD THEREOF Filling date: 6 Nov 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 Nov 2025 Issue date: 13 May 2021 | 1 Aug 2018 | 13 May 2021 |
| Utility: High-strength hot-dip galvanized steel sheet having excellent plating surface quality and adhesion, and method of manufacturing the same Filling date: 6 Nov 2025 Issue date: 11 May 2021 | 22 Dec 2017 | 11 May 2021 |
| Utility: Method and device for magnetic domain refinement of oriented electrical steel plate Filling date: 6 Nov 2025 Issue date: 11 May 2021 | 23 Dec 2016 | 11 May 2021 |
| Utility: METHOD FOR RECOVERING NICKEL AND COBALT FROM NICKEL, IRON, AND COBALT-CONTAINING RAW MATERIAL Filling date: 6 Nov 2025 Issue date: 6 May 2021 | 22 Dec 2017 | 6 May 2021 |
| Utility: SIDE TRIMMING DEVICE Filling date: 6 Nov 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 Nov 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 Nov 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 Nov 2025 Issue date: 6 May 2021 | 20 Dec 2017 | 6 May 2021 |
| Utility: Straightening system and straightening method Filling date: 6 Nov 2025 Issue date: 4 May 2021 | 27 Jul 2016 | 4 May 2021 |
| Utility: Plated steel sheet having multilayer structure and manufacturing method therefor Filling date: 6 Nov 2025 Issue date: 27 Apr 2021 | 21 Dec 2017 | 27 Apr 2021 |
| Utility: Stainless steel for polymer fuel cell separation plate having improved hydrophilicity and contact resistance and method for manufacturing same Filling date: 6 Nov 2025 Issue date: 27 Apr 2021 | 21 Dec 2016 | 27 Apr 2021 |
