Ja Hwa KOO

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Gwacheon-si, KR

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Patents Grantslast 30 patents

Information Patent Grant
Bridge expansion joint
- Patent number 9,938,676
- Issue date Apr 10, 2018
- Ja Hwa Koo
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES

Patents Applicationslast 30 patents

Information Patent Application
BRIDGE EXPANSION JOINT
- Publication number 20170073910
- Publication date Mar 16, 2017
- JINHYUNG Construction Co., Ltd.
- Ja Hwa KOO
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Application
APPARATUS AND METHOD OF FORMING AN ANTI-SLIP GROOVE ON ROADWAY BY U...
- Publication number 20150284920
- Publication date Oct 8, 2015
- Ja Hwa KOO
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES