| Utility: HIGH STRENGTH MAGNESIUM ALLOY WITH EXCELLENT FLAME RETARDANCY, AND METHOD FOR PRODUCING SAME Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 21 Dec 2017 | 19 Mar 2020 |
| Utility: AUSTENITIC STAINLESS STEEL HAVING EXCELLENT PROCESSABILITY AND SURFACE CHARACTERISTICS, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 21 Dec 2017 | 19 Mar 2020 |
| Utility: AUSTENITIC STEEL HAVING EXCELLENT SURFACE CHARACTERISTICS, AND METHOD OF MANUFACTURING THE SAME Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 21 Dec 2017 | 19 Mar 2020 |
| 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: 19 Mar 2020 | 21 Dec 2017 | 19 Mar 2020 |
| Utility: NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 19 Dec 2017 | 19 Mar 2020 |
| Utility: NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 19 Dec 2017 | 19 Mar 2020 |
| Utility: NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 19 Dec 2017 | 19 Mar 2020 |
| 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: 19 Mar 2020 | 15 Dec 2017 | 19 Mar 2020 |
| Utility: METHOD FOR REFINING MAGNETIC DOMAIN OF GRAIN-ORIENTED ELECTRICAL STEEL PLATE AND DEVICE THEREFOR Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 11 Dec 2017 | 19 Mar 2020 |
| Utility: HIGH TENSILE STRENGTH STEEL HAVING EXCELLENT BENDABILITY AND STRETCH-FLANGEABILITY AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 7 Dec 2017 | 19 Mar 2020 |
| Utility: FERRITIC STAINLESS STEEL HAVING EXCELLENT STRENGTH AND CORROSION RESISTANCE TO ACID AND METHOD OF MANUFACTURING THE SAME Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 6 Dec 2017 | 19 Mar 2020 |
| Utility: SHOT BALL HAVING EXCELLENT STRENGTH AND WEAR RESISTANCE AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 1 Dec 2017 | 19 Mar 2020 |
| Utility: FILTER UNIT AND PLATING APPARATUS INCLUDING SAME Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 23 May 2017 | 19 Mar 2020 |
| Utility: Aluminum-iron alloy-coated steel sheet for hot press forming, having excellent hydrogen delayed fracture resistance, peeling resistance, and weldability and hot-formed member using same Filling date: 6 Sep 2025 Issue date: 17 Mar 2020 | 23 Dec 2016 | 17 Mar 2020 |
| Utility: REACTION APPARATUS AND METHOD Filling date: 6 Sep 2025 Issue date: 12 Mar 2020 | 12 Jan 2018 | 12 Mar 2020 |
| Utility: HIGH-STRENGTH STEEL HAVING EXCELLENT FRACTURE INITIATION RESISTANCE AND FRACTURE PROPAGATION ARRESTABILITY AT LOW TEMPERATURE AND METHOD OF MANUFACTURING THE SAME Filling date: 6 Sep 2025 Issue date: 12 Mar 2020 | 22 Dec 2017 | 12 Mar 2020 |
| Utility: PLATED STEEL SHEET HAVING MULTILAYER STRUCTURE AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 12 Mar 2020 | 21 Dec 2017 | 12 Mar 2020 |
| Utility: HIGH MANGANESE HOT DIP ALUMINUM-PLATED STEEL SHEET HAVING EXCELLENT SACRIFICIAL CORROSION RESISTANCE AND PLATABILITY AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 12 Mar 2020 | 21 Dec 2017 | 12 Mar 2020 |
| Utility: NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 12 Mar 2020 | 19 Dec 2017 | 12 Mar 2020 |
| Utility: Cooling System Filling date: 6 Sep 2025 Issue date: 12 Mar 2020 | 15 Dec 2017 | 12 Mar 2020 |
| Utility: METHOD FOR PRODUCING LITHIUM HYDROXIDE FROM LITHIUM PHOSPHATE Filling date: 6 Sep 2025 Issue date: 12 Mar 2020 | 13 Dec 2017 | 12 Mar 2020 |
| Utility: FERRITIC STAINLESS STEEL FOR AUTOMOTIVE EXHAUST SYSTEM WITH IMPROVED HEAT RESISTANCE AND CONDENSATE CORROSION RESISTANCE, AND METHOD FOR MANUFACTURING THE SAME Filling date: 6 Sep 2025 Issue date: 12 Mar 2020 | 27 Nov 2017 | 12 Mar 2020 |
| Utility: HIGH STRENGTH MULTI-PHASE STEEL HAVING EXCELLENT BURRING PROPERTIES AT LOW TEMPERATURE, AND METHOD FOR PRODUCING SAME Filling date: 6 Sep 2025 Issue date: 12 Mar 2020 | 23 Nov 2017 | 12 Mar 2020 |
| Utility: LOW ALLOY STEEL SHEET WITH EXCELLENT STRENGTH AND DUCTILITY Filling date: 6 Sep 2025 Issue date: 12 Mar 2020 | 24 May 2017 | 12 Mar 2020 |
| Utility: Zinc alloy plated steel material having excellent weldability and processed-part corrosion resistance and method of manufacturing same Filling date: 6 Sep 2025 Issue date: 10 Mar 2020 | 24 Dec 2015 | 10 Mar 2020 |
| Utility: Heat treatable steel, product formed thereof having ultra high strength and excellent durability, and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 10 Mar 2020 | 22 Dec 2015 | 10 Mar 2020 |
| Utility: HOT DIP COATED STEEL HAVING EXCELLENT PROCESSABILITY, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 5 Mar 2020 | 19 Dec 2017 | 5 Mar 2020 |
| Utility: METHOD FOR PRODUCING HOT-DIP GALVANIZED STEEL SHEET HAVING EXCELLENT PRESS FORMABILITY AND IMAGE CLARITY AFTER PAINTING, AND HOT-DIP GALVANIZED STEEL SHEET PRODUCED THEREBY Filling date: 6 Sep 2025 Issue date: 5 Mar 2020 | 13 Dec 2017 | 5 Mar 2020 |
| Utility: HIGH-CARBON HOT-ROLLED STEEL SHEET HAVING EXCELLENT SURFACE QUALITY AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 5 Mar 2020 | 8 Dec 2017 | 5 Mar 2020 |
| Utility: STEEL FOR PRESSURE VESSELS WITH EXCELLENT RESISTANCE TO HIGH-TEMPERATURE TEMPERING HEAT TREATMENT AND POST-WELD HEAT TREATMENT AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 5 Mar 2020 | 7 Dec 2017 | 5 Mar 2020 |
| Utility: HIGH-STRENGTH STEEL SHEET HAVING EXCELLENT BURRING WORKABILITY IN LOW TEMPERATURE RANGE AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 5 Mar 2020 | 30 Nov 2017 | 5 Mar 2020 |
| Utility: HIGH-STRENGTH WIRE ROD HAVING SUPERIOR IMPACT TOUGHNESS AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 5 Mar 2020 | 23 Nov 2017 | 5 Mar 2020 |
| Utility: Cutter device for processing difficult-to-machine material Filling date: 6 Sep 2025 Issue date: 3 Mar 2020 | 21 Dec 2016 | 3 Mar 2020 |
| Utility: WIRE ROD FOR SPRINGS WITH EXCELLENT CORROSION FATIGUE RESISTANCE, STEEL WIRE, AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 27 Feb 2020 | 6 Dec 2017 | 27 Feb 2020 |
| Utility: HOT-DIP GALVANIZED STEEL PLATE WITH EXCELLENT BAKE HARDENABILITY AND ANTI-AGING PROPERTY AT ROOM TEMPERATURE AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 27 Feb 2020 | 8 Nov 2017 | 27 Feb 2020 |
| Utility: BLOCK STRUCTURE, CONTAINER AND METHOD FOR CONSTRUCTING BLOCK STRUCTURE Filling date: 6 Sep 2025 Issue date: 27 Feb 2020 | 19 Dec 2016 | 27 Feb 2020 |
| Utility: Steel sheet for hot press forming with excellent corrosion resistance and weldability, forming member, and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 25 Feb 2020 | 23 Dec 2014 | 25 Feb 2020 |
| Utility: HIGHLY MOLDED MAGNESIUM ALLOY SHEET AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 20 Feb 2020 | 20 Oct 2017 | 20 Feb 2020 |
| Utility: Fe--P--Cr alloy thin plate and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 18 Feb 2020 | 2 Dec 2015 | 18 Feb 2020 |
| Utility: High manganese steel sheet having high strength and excellent vibration-proof properties and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 18 Feb 2020 | 24 Dec 2013 | 18 Feb 2020 |
| Utility: SOFT HIGH-SILICON STEEL SHEET AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 13 Feb 2020 | 10 Sep 2019 | 13 Feb 2020 |
| Utility: Method for manufacturing reduced iron Filling date: 6 Sep 2025 Issue date: 11 Feb 2020 | 11 Sep 2017 | 11 Feb 2020 |
| Utility: Composition for non-oriented electrical steel sheet, method of manufacturing non-oriented electrical steel sheet product, and non-oriented electrical steel sheet product Filling date: 6 Sep 2025 Issue date: 11 Feb 2020 | 26 Nov 2014 | 11 Feb 2020 |
| Utility: HIGH-STRENGTH AND HIGH-MANGANESE STEEL HAVING EXCELLENT LOW-TEMPERATURE TOUGHNESS AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 6 Feb 2020 | 19 Oct 2017 | 6 Feb 2020 |
| Utility: METHOD FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET Filling date: 6 Sep 2025 Issue date: 30 Jan 2020 | 21 Dec 2017 | 30 Jan 2020 |
| Utility: SOLUTION COMPOSITION FOR SURFACE TREATMENT OF STEEL SHEET AND SURFACE-TREATED STEEL SHEET USING SAME Filling date: 6 Sep 2025 Issue date: 30 Jan 2020 | 28 Sep 2017 | 30 Jan 2020 |
| Utility: FERRITIC STAINLESS STEEL HAVING EXCELLENT SOUND ABSORPTION PROPERTIES FOR EXHAUST SYSTEM HEAT EXCHANGER AND METHOD OF MANUFACTURING THE SAME Filling date: 6 Sep 2025 Issue date: 30 Jan 2020 | 22 Nov 2016 | 30 Jan 2020 |
| Utility: Zn alloy plated steel sheet having excellent phosphatability and spot weldability and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 28 Jan 2020 | 24 Dec 2015 | 28 Jan 2020 |
| Utility: Noncovalent bond-modified carbon structure, and carbon structure/polymer composite comprising same Filling date: 6 Sep 2025 Issue date: 28 Jan 2020 | 24 Dec 2014 | 28 Jan 2020 |
| Utility: ALLOY-PLATED STEEL MATERIAL HAVING EXCELLENT CRACK RESISTANCE, AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 16 Jan 2020 | 21 Dec 2017 | 16 Jan 2020 |
