| Utility: THICK STEEL PLATE HAVING EXCELLENT CRYOGENIC IMPACT TOUGHNESS AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 17 Oct 2019 | 20 Dec 2017 | 17 Oct 2019 |
| Utility: Method for Separating Propylene Carbonate in Preparing Process of Polyether Carbonate Polyol Filling date: 6 Sep 2025 Issue date: 17 Oct 2019 | 15 Dec 2017 | 17 Oct 2019 |
| Utility: HIGH STRENGTH STEEL SHEET HAVING EXCELLENT HIGH-TEMPERATURE ELONGATION CHARACTERISTIC, WARM-PRESSED MEMBER, AND MANUFACTURING METHODS FOR THE SAME Filling date: 6 Sep 2025 Issue date: 17 Oct 2019 | 12 Dec 2017 | 17 Oct 2019 |
| Utility: COLD-ROLLED STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE AND FORMABILITY, AND METHOD FOR MANUFACTURING SAME Filling date: 6 Sep 2025 Issue date: 17 Oct 2019 | 11 Dec 2017 | 17 Oct 2019 |
| Utility: STEEL MATERIAL FOR WELDED STEEL PIPE, HAVING EXCELLENT LONGITUDINAL UNIFORM ELONGATION, MANUFACTURING METHOD THEREFOR, AND STEEL PIPE USING SAME Filling date: 6 Sep 2025 Issue date: 17 Oct 2019 | 7 Dec 2017 | 17 Oct 2019 |
| Utility: FERRITIC STAINLESS STEEL HAVING EXCELLENT RIDGING PROPERTY AND EXCELLENT SURFACE QUALITY AND METHOD OF MANUFACTURING THE SAME Filling date: 6 Sep 2025 Issue date: 17 Oct 2019 | 4 Jul 2017 | 17 Oct 2019 |
| Utility: Solid oxide fuel cell having longitudinal and lateral channels Filling date: 6 Sep 2025 Issue date: 15 Oct 2019 | 8 Jul 2013 | 15 Oct 2019 |
| Utility: ROLLING FACILITY AND ROLLING METHOD Filling date: 6 Sep 2025 Issue date: 10 Oct 2019 | 12 Dec 2017 | 10 Oct 2019 |
| Utility: DEPHOSPHORIZING FLUX AND METHOD FOR PREPARING SAME Filling date: 6 Sep 2025 Issue date: 10 Oct 2019 | 11 Dec 2017 | 10 Oct 2019 |
| Utility: MOLTEN STEEL TREATMENT DEVICE AND MOLTEN STEEL TREATMENT METHOD USING SAME Filling date: 6 Sep 2025 Issue date: 10 Oct 2019 | 30 Oct 2017 | 10 Oct 2019 |
| Utility: GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME Filling date: 6 Sep 2025 Issue date: 10 Oct 2019 | 25 Oct 2017 | 10 Oct 2019 |
| Utility: APPARATUS AND METHOD FOR FEEDING MATERIAL Filling date: 6 Sep 2025 Issue date: 10 Oct 2019 | 24 Aug 2017 | 10 Oct 2019 |
| Utility: Apparatus for Cutting Material and System for Cutting Material Filling date: 6 Sep 2025 Issue date: 26 Sep 2019 | 11 Jul 2017 | 26 Sep 2019 |
| Utility: ULTRAHIGH-STRENGTH HIGH-DUCTILITY STEEL SHEET HAVING EXCELLENT YIELD STRENGTH, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 26 Sep 2019 | 18 May 2017 | 26 Sep 2019 |
| Utility: Molten iron manufacturing apparatus and molten iron manufacturing method Filling date: 6 Sep 2025 Issue date: 24 Sep 2019 | 28 Dec 2012 | 24 Sep 2019 |
| Utility: METHOD OF CONTINUOUSLY ANNEALING A STRIP Filling date: 6 Sep 2025 Issue date: 12 Sep 2019 | 30 May 2019 | 12 Sep 2019 |
| Utility: ANNEALING SEPARATING AGENT COMPOSITION FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET, GRAIN-ORIENTED ELECTRICAL STEEL SHEET, AND METHOD FOR MANUFACTURING GRAIN ORIENTED ELECTRICAL STEEL SHEET Filling date: 6 Sep 2025 Issue date: 12 Sep 2019 | 25 Oct 2017 | 12 Sep 2019 |
| Utility: COMPOSITE RESIN COMPOSITION FOR STEEL PLATE FOR FUEL TANK, COMPOSITE RESIN-COATED STEEL PLATE USING SAME, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 5 Sep 2019 | 14 Nov 2017 | 5 Sep 2019 |
| Utility: Dual-phase steel sheet with excellent formability and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 3 Sep 2019 | 26 Nov 2015 | 3 Sep 2019 |
| Utility: PRESSURE VESSEL STEEL HAVING EXCELLENT HYDROGEN INDUCED CRACKING RESISTANCE, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 29 Aug 2019 | 3 Nov 2017 | 29 Aug 2019 |
| Utility: CASTING EQUIPMENT AND CASTING METHOD USING SAME Filling date: 6 Sep 2025 Issue date: 29 Aug 2019 | 2 Nov 2017 | 29 Aug 2019 |
| Utility: SURFACE-TREATMENT SOLUTION COMPOSITION CONTAINING TRIVALENT CHROMIUM AND INORGANIC COMPOUND, ZINC-BASED PLATED STEEL SHEET SURFACE-TREATED USING SAME, AND METHOD FOR PRODUCING SAME Filling date: 6 Sep 2025 Issue date: 29 Aug 2019 | 29 Sep 2017 | 29 Aug 2019 |
| Utility: SOLUTION COMPOSITION FOR STEEL SHEET SURFACE TREATMENT, ZINC-BASED PLATED STEEL SHEET SURFACE-TREATED WITH SAME, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 29 Aug 2019 | 14 Jun 2017 | 29 Aug 2019 |
| Utility: Method for manufacturing transparent pattern print steel plate Filling date: 6 Sep 2025 Issue date: 27 Aug 2019 | 19 Aug 2015 | 27 Aug 2019 |
| Utility: Powder manufacturing apparatus and powder forming method Filling date: 6 Sep 2025 Issue date: 27 Aug 2019 | 24 Dec 2013 | 27 Aug 2019 |
| Utility: ULTRAHIGH-STRENGTH STEEL SHEET HAVING EXCELLENT YIELD RATIO, AND MANUFACTURING METHOD THEREFOR Filling date: 6 Sep 2025 Issue date: 22 Aug 2019 | 7 Nov 2017 | 22 Aug 2019 |
| Utility: ALLOY METAL FOIL FOR USE AS DEPOSITION MASK, DEPOSITION MASK, METHODS OF PREPARING THE SAME, AND METHOD OF MANUFACTURING ORGANIC LIGHT-EMITTING DEVICE USING THE SAME Filling date: 6 Sep 2025 Issue date: 22 Aug 2019 | 21 Sep 2017 | 22 Aug 2019 |
| Utility: Insulating coating composition for oriented electrical steel sheet, oriented electrical steel sheet having insulating coating formed on surface thereof by using same, and preparation method therefor Filling date: 6 Sep 2025 Issue date: 20 Aug 2019 | 4 Dec 2014 | 20 Aug 2019 |
| Utility: Method and apparatus for purification of dimethyl carbonate using pervaporation Filling date: 6 Sep 2025 Issue date: 13 Aug 2019 | 24 Dec 2015 | 13 Aug 2019 |
| Utility: Ultrahigh-strength steel for welding structure with excellent toughness in welding heat-affected zones thereof, and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 6 Aug 2019 | 22 Dec 2014 | 6 Aug 2019 |
