| Utility: Zinc-based plated steel sheet having post-treated coating formed thereon Filling date: 6 Sep 2025 Issue date: 22 Feb 2022 | 8 Sep 2020 | 22 Feb 2022 |
| Utility: Non-oriented electrical steel sheet and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 22 Feb 2022 | 19 Dec 2017 | 22 Feb 2022 |
| Utility: Method for refining magnetic domain of grain-oriented electrical steel plate and device therefor Filling date: 6 Sep 2025 Issue date: 22 Feb 2022 | 11 Dec 2017 | 22 Feb 2022 |
| Utility: Zinc alloy plated steel material having excellent weldability and processed-part corrosion resistance Filling date: 6 Sep 2025 Issue date: 15 Feb 2022 | 27 Jan 2020 | 15 Feb 2022 |
| Utility: Photovoltaic power generation module Filling date: 6 Sep 2025 Issue date: 15 Feb 2022 | 7 Dec 2018 | 15 Feb 2022 |
| Utility: Brake disc and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 15 Feb 2022 | 13 Dec 2017 | 15 Feb 2022 |
| Utility: Non-oriented electrical steel sheet and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 25 Jan 2022 | 23 Dec 2016 | 25 Jan 2022 |
| Utility: Dephosphorizing flux and method for preparing same Filling date: 6 Sep 2025 Issue date: 18 Jan 2022 | 11 Dec 2017 | 18 Jan 2022 |
| 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: 18 Jan 2022 | 25 Oct 2017 | 18 Jan 2022 |
| Utility: Hot-rolled coated steel sheet with excellent workability and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 11 Jan 2022 | 23 Dec 2016 | 11 Jan 2022 |
| Utility: Steel sheet for tool and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 4 Jan 2022 | 29 Jun 2016 | 4 Jan 2022 |
| Utility: Multi-layered zinc alloy plated steel having excellent spot weldability and corrosion resistance Filling date: 6 Sep 2025 Issue date: 28 Dec 2021 | 22 Dec 2017 | 28 Dec 2021 |
| Utility: Molten material treatment apparatus Filling date: 6 Sep 2025 Issue date: 21 Dec 2021 | 12 Jul 2018 | 21 Dec 2021 |
| Utility: Single layer zinc alloy plated steel material exhibiting excellent spot weldability and corrosion resistance, and fabrication method therefor Filling date: 6 Sep 2025 Issue date: 21 Dec 2021 | 21 Dec 2017 | 21 Dec 2021 |
| Utility: Ultra high strength hot-rolled steel sheet having excellent ductility and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 21 Dec 2021 | 21 Nov 2016 | 21 Dec 2021 |
| Utility: Ultra-high strength steel plate having excellent formability and hole-expandability, and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 21 Dec 2021 | 5 Oct 2016 | 21 Dec 2021 |
| Utility: Steel sheet for hot press formed member having excellent coating adhesion and manufacturing method for the same Filling date: 6 Sep 2025 Issue date: 14 Dec 2021 | 31 May 2018 | 14 Dec 2021 |
| Utility: Zinc alloy plated steel having excellent weldability and corrosion resistance Filling date: 6 Sep 2025 Issue date: 7 Dec 2021 | 21 Dec 2017 | 7 Dec 2021 |
| Utility: Ultra-high strength steel sheet having excellent bendability and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 7 Dec 2021 | 7 Dec 2017 | 7 Dec 2021 |
| Utility: Hot rolled steel sheet having excellent strength and elongation Filling date: 6 Sep 2025 Issue date: 30 Nov 2021 | 12 Apr 2018 | 30 Nov 2021 |
| Utility: Apparatus and method for controlling concentration of oxygen in heating furnace Filling date: 6 Sep 2025 Issue date: 30 Nov 2021 | 20 Dec 2017 | 30 Nov 2021 |
| Utility: Grain-oriented electrical steel plate and production method therefor Filling date: 6 Sep 2025 Issue date: 23 Nov 2021 | 21 Dec 2015 | 23 Nov 2021 |
| 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: 16 Nov 2021 | 20 Dec 2017 | 16 Nov 2021 |
| 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: 9 Nov 2021 | 21 Dec 2017 | 9 Nov 2021 |
| 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: 9 Nov 2021 | 20 Dec 2017 | 9 Nov 2021 |
| Utility: Apparatus and method for feeding material Filling date: 6 Sep 2025 Issue date: 9 Nov 2021 | 24 Aug 2017 | 9 Nov 2021 |
| Utility: Plated steel sheet having fine and even plating structure Filling date: 6 Sep 2025 Issue date: 9 Nov 2021 | 23 Dec 2016 | 9 Nov 2021 |
| Utility: Non-oriented electrical steel sheet and method for producing same Filling date: 6 Sep 2025 Issue date: 2 Nov 2021 | 20 Dec 2017 | 2 Nov 2021 |
| Utility: Enhanced wear resistant steel and methods of making the same Filling date: 6 Sep 2025 Issue date: 26 Oct 2021 | 11 May 2018 | 26 Oct 2021 |
| Utility: Pressure vessel steel having excellent hydrogen induced cracking resistance, and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 26 Oct 2021 | 3 Nov 2017 | 26 Oct 2021 |
| Utility: Magnesium alloy plate and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 19 Oct 2021 | 21 Dec 2017 | 19 Oct 2021 |
| Utility: High-strength and high-manganese steel having excellent low-temperature toughness and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 19 Oct 2021 | 19 Oct 2017 | 19 Oct 2021 |
| Utility: Roller assembly, casting apparatus, and roller separating method for same Filling date: 6 Sep 2025 Issue date: 12 Oct 2021 | 8 Aug 2018 | 12 Oct 2021 |
| Utility: Steel sheet for hot press formed member having excellent painting adhesion and post-painting corrosion resistance Filling date: 6 Sep 2025 Issue date: 12 Oct 2021 | 31 May 2018 | 12 Oct 2021 |
| Utility: Steel for pipes having high fatigue resistance, method of manufacturing the same, and welded steel pipe using the same Filling date: 6 Sep 2025 Issue date: 12 Oct 2021 | 11 Sep 2017 | 12 Oct 2021 |
| Utility: Zn-Mg alloy plated steel material having excellent corrosion resistance and plating adhesion Filling date: 6 Sep 2025 Issue date: 5 Oct 2021 | 22 Dec 2017 | 5 Oct 2021 |
| Utility: High-strength steel material having excellent low-temperature strain aging impact properties and welding heat-affected zone impact properties and method for manufacturing same Filling date: 6 Sep 2025 Issue date: 5 Oct 2021 | 15 Dec 2016 | 5 Oct 2021 |
| Utility: Wire rod having excellent low temperature impact toughness and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 5 Oct 2021 | 18 Nov 2016 | 5 Oct 2021 |
| Utility: Field dissimilar metal welding technology for enhanced wear resistant high manganese steel Filling date: 6 Sep 2025 Issue date: 28 Sep 2021 | 2 May 2017 | 28 Sep 2021 |
| Utility: Non-oriented electrical steel sheet and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 7 Sep 2021 | 19 Dec 2017 | 7 Sep 2021 |
| Utility: Method and apparatus for ultrasensitive quantification of microRNA using an atomic force microscope and a hybrid binding domain Filling date: 6 Sep 2025 Issue date: 7 Sep 2021 | 22 Jan 2017 | 7 Sep 2021 |
| Utility: High yield ratio type high-strength cold-rolled steel sheet and manufacturing method thereof Filling date: 6 Sep 2025 Issue date: 31 Aug 2021 | 19 Dec 2016 | 31 Aug 2021 |
| Utility: Hot dip aluminized steel material having excellent corrosion resistance and workability, and manufacturing method therefor Filling date: 6 Sep 2025 Issue date: 17 Aug 2021 | 22 Dec 2017 | 17 Aug 2021 |
| Utility: Magnesium alloy sheet and manufacturing method thereof Filling date: 6 Sep 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 Sep 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 Sep 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 Sep 2025 Issue date: 27 Jul 2021 | 26 Dec 2016 | 27 Jul 2021 |
| Utility: Method for refining magnetic domains of grain-oriented electrical steel plates, and apparatus therefor Filling date: 6 Sep 2025 Issue date: 20 Jul 2021 | 18 Jan 2017 | 20 Jul 2021 |
| Utility: Method for manufacturing grain-oriented electrical steel sheet Filling date: 6 Sep 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 Sep 2025 Issue date: 20 Jul 2021 | 9 Dec 2016 | 20 Jul 2021 |
