YM

Yu-Kun Ma

CT Chunghwa Picture Tubes: 2 patents #298 of 907Top 35%
Overall (All Time): #2,185,950 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6674228 Multi-layer common lens arrangement for main focus lens of multi-beam electron gun Hsing-Yao Chen, Hsiang-Lin Chang, Chun-Hsien Yeh 2004-01-06
6153970 Color CRT electron gun with asymmetric auxiliary beam passing aperture Hsing-Yao Chen 2000-11-28