Chang; Hyun Young
Patent Applications and Registrations
Patent applications and USPTO patent grants for Chang; Hyun Young.The latest application filed is for "apparatus and method for inspecting pipelines".
- Chang; Hyun Young - Gyeonggi-Do N/A KR
- Chang; Hyun Young - Kwangju KR
- Chang; Hyun-Young - Kyungki-do KR
- Chang; Hyun-Young - Kyounggido KR
| Patent | Date |
|---|---|
| Apparatus and method for inspecting pipelines Grant 9,404,773 - Chang , et al. August 2, 2 | 2016-08-02 |
| Apparatus And Method For Inspecting Pipelines App 20140338472 - Chang; Hyun Young | 2014-11-20 |
| Apparatus for cathodic protection in an environment in which thin film corrosive fluids are formed and method thereof Grant 7,198,707 - Chang , et al. April 3, 2 | 2007-04-03 |
| Apparatus for cathodic protection in an environment in which thin film corrosive fluids are formed and method thereof App 20060163084 - Chang; Hyun-Young ; et al. | 2006-07-27 |
| Method for removing nitrogen oxides using natural manganese ores Grant 6,641,790 - Hong , et al. November 4, 2 | 2003-11-04 |
| Method for removing nitrogen oxides using natural manganese ores App 20020155049 - Hong, Sung-Ho ; et al. | 2002-10-24 |
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