| Utility: STEEL SHEET HAVING EXCELLENT RESISTANCE TO LIQUID METAL EMBRITTLEMENT CRACKS AND METHOD FOR MANUFACTURING THE SAME Filling date: 6 Sep 2025 Issue date: 7 May 2020 | 22 Jun 2018 | 7 May 2020 |
| Utility: AUSTENITIC STEEL MATERIAL HAVING EXCELLENT ABRASION RESISTANCE AND TOUGHNESS AND MANUFACTURING METHOD THE SAME Filling date: 6 Sep 2025 Issue date: 7 May 2020 | 21 Dec 2017 | 7 May 2020 |
| Utility: PREPARATION METHOD OF LITHIUM-TITANIUM COMPLEX OXIDE ACCORDING TO PARTICLE SIZE CONTROL OF SLURRY THROUGH WET-MILLING Filling date: 6 Sep 2025 Issue date: 7 May 2020 | 26 May 2017 | 7 May 2020 |
| Utility: BRAKE DISC AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 16 Apr 2020 | 13 Dec 2017 | 16 Apr 2020 |
| Utility: STEEL SHEET FOR HOT PRESS FORMED MEMBER HAVING EXCELLENT RESISTANCE TO HYDROGEN DELAYED FRACTURE AND METHOD FOR MANUFACTURING THEREOF Filling date: 6 Sep 2025 Issue date: 9 Apr 2020 | 31 May 2018 | 9 Apr 2020 |
| Utility: ULTRA-THICK STEEL MATERIAL HAVING EXCELLENT SURFACE PART NRL-DWT PROPERTIES AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 9 Apr 2020 | 20 Dec 2017 | 9 Apr 2020 |
| Utility: STEEL SHEET FOR HOT PRESS FORMED MEMBER HAVING EXCELLENT PAINTING ADHESION AND POST-PAINTING CORROSION RESISTANCE, AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 2 Apr 2020 | 31 May 2018 | 2 Apr 2020 |
| Utility: POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING SAME, AND LITHIUM SECONDARY BATTERY COMPRISING SAME Filling date: 6 Sep 2025 Issue date: 2 Apr 2020 | 7 Dec 2017 | 2 Apr 2020 |
| Utility: METHOD FOR PREPARING CATHODE ACTIVE MATERIAL FOR SECONDARY BATTERY AND APPARATUS FOR PREPARING CATHODE ACTIVE MATERIAL FOR SECONDARY BATTERY Filling date: 6 Sep 2025 Issue date: 26 Mar 2020 | 22 Dec 2017 | 26 Mar 2020 |
| Utility: APPARATUS FOR MEASURING CRYSTAL GRAIN SIZE OF STEEL SHEET Filling date: 6 Sep 2025 Issue date: 26 Mar 2020 | 22 Dec 2017 | 26 Mar 2020 |
| 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: 26 Mar 2020 | 20 Dec 2017 | 26 Mar 2020 |
| Utility: NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 26 Mar 2020 | 19 Dec 2017 | 26 Mar 2020 |
| Utility: STEEL FOR PRESSURE VESSELS HAVING EXCELLENT RESISTANCE TO HYDROGEN INDUCED CRACKING AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 26 Mar 2020 | 15 Dec 2017 | 26 Mar 2020 |
| Utility: GOLD-COLORED STEEL SHEET AND MANUFACTURING METHOD THEREOF Filling date: 6 Sep 2025 Issue date: 26 Mar 2020 | 15 May 2017 | 26 Mar 2020 |
| Utility: HIGH MANGANESE STEEL PIPE WITH STEP-OUT WELD ZONE EROSION-CORROSION RESISTANCE AND METHOD OF MAKING THE SAME Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 4 Nov 2019 | 19 Mar 2020 |
| Utility: Field Girth Welding Technology for High Manganese Steel Slurry Pipelines Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 31 Oct 2019 | 19 Mar 2020 |
| Utility: ZN-NI ELECTROPLATED STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE AND FORMABILITY AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 22 Dec 2017 | 19 Mar 2020 |
| Utility: HIGH-STRENGTH STEEL MATERIAL HAVING ENHANCED RESISTANCE TO CRACK INITIATION AND PROPAGATION AT LOW TEMPERATURE AND METHOD FOR MANUFACTURING THE SAME Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 22 Dec 2017 | 19 Mar 2020 |
| Utility: ADHESIVE COATING COMPOSITION FOR NON-ORIENTED ELECTRICAL STEEL SHEET, AND METHOD FOR MANUFACTURING NON-ORIENTED ELECTRICAL STEEL SHEET Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 22 Dec 2017 | 19 Mar 2020 |
| Utility: MAGNESIUM ALLOY SHEET AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 21 Dec 2017 | 19 Mar 2020 |
| Utility: STEEL MATERIAL HAVING EXCELLENT CORROSION RESISTANCE IN DEW CONDENSATION ENVIRONMENT CONTAINING SULFIDE AND METHOD FOR PRODUCING SAME Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 21 Dec 2017 | 19 Mar 2020 |
| Utility: ELECTRICAL STEEL SHEET ADHESIVE COATING COMPOSITION, ELECTRICAL STEEL SHEET PRODUCT, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 19 Mar 2020 | 21 Dec 2017 | 19 Mar 2020 |
| 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: 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: 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 |
