Assignee
Inventors
- Yukio Ishiuchi (13 patents)
- Toshikazu Hamamoto (33 patents)
- Michishige Sakai (1 patents)
- Makoto Nagata (43 patents)
- Hiroshi Waragaya (1 patents)
- Iwao Ishii (1 patents)
- Eiji Kaneko (31 patents)
- Hiroyoshi Ootsuki (1 patents)
US Patent 6216557 · Granted Apr 17, 2001