Assignee
Inventors
- Hiroki Hirai (188 patents)
- Masashi Sugimoto (23 patents)
- Tetsuji Tanaka (95 patents)
- Shigeki Sakai (41 patents)
- Yoshito Sakai (17 patents)
- Nori Inoue (50 patents)
- Yuichiro Tsutsumi (5 patents)
US Patent 6215870 · Granted Apr 10, 2001