Assignee
Inventors
- Natsuki Ishizuka (7 patents)
- Ken-ichi Matsumura (2 patents)
- Katsunori Sakai (23 patents)
- Toshiro Konoike (14 patents)
- Tadahiko Yorifuji (2 patents)
- Seijiro Hara (1 patents)
- Yoshiyuki Matsuo (6 patents)
US Patent 6218427 · Granted Apr 17, 2001