JC

Joon Ho Chang

EC Ehwa Diamond Ind. Co.: 1 patents #3 of 7Top 45%
EC Ehwa Diamond Industrial Co.: 1 patents #1 of 2Top 50%
📍 Seongsan-myeon, KR: #2 of 2 inventorsTop 100%
Overall (2002): #58,808 of 266,432Top 25%
2
Patents 2002

Issued Patents 2002

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
D466139 Core drill See Hyung Kim 2002-11-26
D463965 Grinding wheel Chang-Hyun Lee 2002-10-08