Assignee
Inventors
- Yasuhiko Ishida (61 patents)
- Minoru Hiroki (1 patents)
- Toshiaki Kobari (15 patents)
- Osamu Satou (26 patents)
- Yasushi Nakaizumi (5 patents)
- Akimitsu Okura (9 patents)
- Hideiti Kimura (1 patents)
US Patent 6031235 · Granted Feb 29, 2000