YK

Yeo K. Kee

📍 Singapore, SG: #6,661 of 13,971 inventorsTop 50%
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1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4426139 Progressive addition lens Raoul F. van Ligten 1984-01-17