HY

Hidemasa Yamakawa

SE Seiko Epson: 2 patents #171 of 763Top 25%
📍 Koumi, JP: #1 of 4 inventorsTop 25%
Overall (2002): #61,985 of 266,432Top 25%
2
Patents 2002

Issued Patents 2002

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6491397 Illumination optical system and projector using the same Yasunori Ogawa, Koichi Akiyama 2002-12-10
6481850 Projector Takeshi Takezawa, Nobuo Watanabe 2002-11-19