Electromagnetic wave shielding material and method of preparing the same
US-2025290189-A1 · Sep 18, 2025 · US
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Cha Sung Chul patents
Cha Sung Chul is listed as an inventor on 35 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Cha Sung Chul |
| Total patents | 35 |
| First publication | Feb 2, 2017 |
| Latest publication | Sep 18, 2025 |
Notable patents
Publications ranked by popularity score, then publication date.
Component for fuel injector and method for coating the same
US-11661649-B2 · May 30, 2023 · US
Ball and valve seat for fuel injector, and method for coating the same
US-2021254206-A1 · Aug 19, 2021 · US
Component for fuel injector and method for coating the same
US-2021190024-A1 · Jun 24, 2021 · US
High strength spring steel having excellent corrosion resistance
US-10718039-B2 · Jul 21, 2020 · US
Ball and valve seat for fuel injector, and method for coating same
US-2020217287-A1 · Jul 9, 2020 · US
Ultra-high-strength spring steel for valve spring
US-10689736-B2 · Jun 23, 2020 · US
Nickel alloys for exhaust system components
US-10544486-B2 · Jan 28, 2020 · US
Stainless steel having excellent oxidation resistance at high temperature
US-10513765-B2 · Dec 24, 2019 · US
Ultra high-strength spring steel
US-10494705-B2 · Dec 3, 2019 · US
Recent patents
Latest publications not already listed above.
High strength special steel
US-10487382-B2 · Nov 26, 2019 · US
Ultrahigh-strength spring steel
US-10487381-B2 · Nov 26, 2019 · US
High-strength special steel
US-10487380-B2 · Nov 26, 2019 · US
Method of treating composite piston pin and surface treated composite piston pin
US-10400324-B2 · Sep 3, 2019 · US
Method of treating composite piston pin and surface treated composite piston pin
US-2019242005-A1 · Aug 8, 2019 · US
High manganese steel
US-10329650-B2 · Jun 25, 2019 · US
Hot stamping steel and producing method thereof
US-10308996-B2 · Jun 4, 2019 · US
Highly durable coil spring steel
US-10000831-B2 · Jun 19, 2018 · US
Nickel alloys for exhaust system components
US-2018100217-A1 · Apr 12, 2018 · US
High Manganese Steel
US-2018100220-A1 · Apr 12, 2018 · US
Stainless steel having excellent oxidation resistance at high temperature
US-2018100221-A1 · Apr 12, 2018 · US
High strength special steel
US-2018073114-A1 · Mar 15, 2018 · US
High-strength special steel
US-2018051364-A1 · Feb 22, 2018 · US
Method of treating composite piston pin and surface treated composite piston pin
US-2018023186-A1 · Jan 25, 2018 · US
Composite piston pin and manufacturing method of the same
US-2018010688-A1 · Jan 11, 2018 · US
Ultrahigh-strength spring steel
US-2017362689-A1 · Dec 21, 2017 · US
High-strength spring steel having excellent corrosion resistance
US-2017362688-A1 · Dec 21, 2017 · US
High strength spring steel having excellent corrosion resistance
US-2017298487-A1 · Oct 19, 2017 · US
High strength spring steel having excellent corrosion resistance
US-2017298486-A1 · Oct 19, 2017 · US
Highly durable coil spring steel
US-2017167004-A1 · Jun 15, 2017 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Hyundai Motor Co Ltd | 30 |
| Hyundai Steel Co | 9 |
| Hyundai Kefico Corp | 5 |
| Sk Chemicals Co Ltd | 2 |
| Korea Inst Sci & Tech | 2 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| C22C38/04 | 24 |
| C22C38/02 | 24 |
| C22C38/44 | 22 |
| C22C38/46 | 22 |
| C22C38/002 | 20 |