WK

Won S. Kwak

PI Ppg Industries: 2 patents #16 of 198Top 9%
📍 Akron, OH: #13 of 116 inventorsTop 15%
🗺 Ohio: #248 of 3,574 inventorsTop 7%
Overall (1989): #12,832 of 140,708Top 10%
2
Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4831142 Spiro indoline-pyranobenzoxazinones — 1989-05-16
4816584 Photochromic spiro(indoline)benzoxazines Chin-Wen Chen 1989-03-28