| Utility: Micro-grid system with un-interruptible power supply Filling date: 6 Sep 2025 Issue date: 27 Sep 2022 | 11 Dec 2019 | 27 Sep 2022 |
| Utility: Wire rod for cold heading, processed product using same, and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 13 Sep 2022 | 10 Oct 2018 | 13 Sep 2022 |
| Utility: Cold-rolled steel plate for hot forming, having excellent corrosion-resistance and spot-weldability, hot-formed member, and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 13 Sep 2022 | 26 Sep 2017 | 13 Sep 2022 |
| Utility: Method for producing alloy steel Filling date: 6 Sep 2025 Issue date: 13 Sep 2022 | 16 Dec 2016 | 13 Sep 2022 |
| Utility: Low-temperature steel plate having excellent impact toughness, and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 6 Sep 2022 | 26 Jun 2018 | 6 Sep 2022 |
| Utility: Composite material steel sheet Filling date: 6 Sep 2025 Issue date: 23 Aug 2022 | 6 Dec 2018 | 23 Aug 2022 |
| Utility: Steel sheet with excellent bake hardening properties and plating adhesion and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 23 Aug 2022 | 30 Nov 2018 | 23 Aug 2022 |
| Utility: Ultra high strength hot rolled steel sheet having low deviation of mechanical property and excellent surface quality, and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 23 Aug 2022 | 6 Jul 2018 | 23 Aug 2022 |
| Utility: High strength steel sheet having excellent formability and manufacturing method thereof Filling date: 6 Sep 2025 Issue date: 23 Aug 2022 | 4 Aug 2017 | 23 Aug 2022 |
| Utility: Austenite-based molten aluminum-plated steel sheet having excellent properties of plating and weldability Filling date: 6 Sep 2025 Issue date: 23 Aug 2022 | 22 Dec 2016 | 23 Aug 2022 |
| Utility: Multilayered zinc alloy plated steel material having excellent spot weldability and corrosion resistance Filling date: 6 Sep 2025 Issue date: 16 Aug 2022 | 13 Dec 2018 | 16 Aug 2022 |
| 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: 16 Aug 2022 | 27 Nov 2017 | 16 Aug 2022 |
| Utility: Non-oriented electrical steel sheet and method for producing same Filling date: 6 Sep 2025 Issue date: 9 Aug 2022 | 16 May 2018 | 9 Aug 2022 |
| Utility: High-hardness wear-resistant steel and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 2 Aug 2022 | 4 Dec 2017 | 2 Aug 2022 |
| 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: 26 Jul 2022 | 28 Jun 2019 | 26 Jul 2022 |
| Utility: Steel material for low yield ratio, high-strength steel pipe having excellent low-temperature toughness, and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 26 Jul 2022 | 18 Dec 2018 | 26 Jul 2022 |
| Utility: Alloy-plated steel material having excellent corrosion resistance and high surface quality Filling date: 6 Sep 2025 Issue date: 26 Jul 2022 | 22 Dec 2017 | 26 Jul 2022 |
| Utility: Stainless steel for separation plate of polymer electrolyte membrane fuel cell having improved hydrophilic property and corrosion resistance, and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 26 Jul 2022 | 16 Dec 2016 | 26 Jul 2022 |
| Utility: Surface-treated metallic material with easy control of glossiness and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 12 Jul 2022 | 23 Nov 2016 | 12 Jul 2022 |
| Utility: Clad steel plate having excellent strength and formability, and production method therefor Filling date: 6 Sep 2025 Issue date: 5 Jul 2022 | 23 Jun 2017 | 5 Jul 2022 |
| Utility: Wear-resistant steel having excellent hardness and impact toughness, and method for producing same Filling date: 6 Sep 2025 Issue date: 28 Jun 2022 | 21 Dec 2018 | 28 Jun 2022 |
| Utility: Method for preparing porous carbon material by using coal tar generated in COG process Filling date: 6 Sep 2025 Issue date: 28 Jun 2022 | 2 Oct 2018 | 28 Jun 2022 |
| Utility: Plating steel sheet for hot press forming, forming member using same, and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 14 Jun 2022 | 21 Dec 2018 | 14 Jun 2022 |
| Utility: Roll stamping apparatus and method Filling date: 6 Sep 2025 Issue date: 14 Jun 2022 | 21 Dec 2016 | 14 Jun 2022 |
| Utility: High-strength steel sheet with excellent crashworthiness characteristics and formability and method of manufacturing the same Filling date: 6 Sep 2025 Issue date: 31 May 2022 | 15 Jul 2019 | 31 May 2022 |
| Utility: High-strength steel sheet with excellent crashworthiness characteristics and formability and method of manufacturing the same Filling date: 6 Sep 2025 Issue date: 31 May 2022 | 15 Jul 2019 | 31 May 2022 |
| 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: 31 May 2022 | 14 Jun 2017 | 31 May 2022 |
| Utility: Hot-dip galvanized steel sheet having excellent low-temperature adhesion and workability Filling date: 6 Sep 2025 Issue date: 24 May 2022 | 20 Dec 2018 | 24 May 2022 |
| Utility: Ferritic stainless steel having excellent high-temperature oxidation resistance, and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 24 May 2022 | 6 Sep 2018 | 24 May 2022 |
| 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: 24 May 2022 | 31 May 2018 | 24 May 2022 |
| Utility: Gold-colored steel sheet and manufacturing method thereof Filling date: 6 Sep 2025 Issue date: 24 May 2022 | 15 May 2017 | 24 May 2022 |
| 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: 17 May 2022 | 11 May 2021 | 17 May 2022 |
| Utility: Zinc alloy plated steel material having excellent surface quality and corrosion resistance Filling date: 6 Sep 2025 Issue date: 17 May 2022 | 13 Dec 2018 | 17 May 2022 |
| Utility: High-hardness wear-resistant steel and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 17 May 2022 | 4 Dec 2017 | 17 May 2022 |
| 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 Sep 2025 Issue date: 17 May 2022 | 22 Dec 2016 | 17 May 2022 |
| Utility: Grain-oriented electrical steel sheet and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 10 May 2022 | 13 Dec 2017 | 10 May 2022 |
| Utility: Grain-oriented electrical steel sheet and magnetic domain refinement method therefor Filling date: 6 Sep 2025 Issue date: 3 May 2022 | 20 Dec 2017 | 3 May 2022 |
| Utility: Non-oriented electrical steel sheet and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 3 May 2022 | 19 Dec 2017 | 3 May 2022 |
| Utility: Method for refining magnetic domains of grain-oriented electrical steel sheet Filling date: 6 Sep 2025 Issue date: 26 Apr 2022 | 20 Dec 2017 | 26 Apr 2022 |
| Utility: High-strength hot-dip zinc plated steel material having excellent plating properties and method for preparing same Filling date: 6 Sep 2025 Issue date: 19 Apr 2022 | 21 Dec 2016 | 19 Apr 2022 |
| Utility: Steel sheet having excellent resistance to liquid metal embrittlement cracks and method for manufacturing the same Filling date: 6 Sep 2025 Issue date: 12 Apr 2022 | 22 Jun 2018 | 12 Apr 2022 |
| Utility: Zinc-based plated steel material having excellent sealer adhesion Filling date: 6 Sep 2025 Issue date: 12 Apr 2022 | 22 Dec 2017 | 12 Apr 2022 |
| Utility: Austenitic stainless steel product having excellent surface properties and manufacturing method of the same Filling date: 6 Sep 2025 Issue date: 12 Apr 2022 | 4 Dec 2017 | 12 Apr 2022 |
| Utility: Non-oriented electrical steel sheet and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 12 Apr 2022 | 9 Dec 2016 | 12 Apr 2022 |
| Utility: Non-oriented electrical steel sheet and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 12 Apr 2022 | 21 Dec 2015 | 12 Apr 2022 |
| 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: 15 Mar 2022 | 21 Jan 2021 | 15 Mar 2022 |
| Utility: Antimicrobial adhesive protein, antimicrobial nanoparticle, antimicrobial composition comprising same nanoparticle, and preparation method for same composition Filling date: 6 Sep 2025 Issue date: 8 Mar 2022 | 13 Jul 2018 | 8 Mar 2022 |
| 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: 8 Mar 2022 | 22 Dec 2017 | 8 Mar 2022 |
| Utility: Magnesium alloy sheet and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 8 Mar 2022 | 21 Dec 2017 | 8 Mar 2022 |
| Utility: Casting sliding gate Filling date: 6 Sep 2025 Issue date: 1 Mar 2022 | 22 Dec 2017 | 1 Mar 2022 |
