Assignee
Inventors
- Ryoji Ichioka (7 patents)
- Shinobu Yamakawa (6 patents)
- Hirohito Okino (4 patents)
- Hajime Kato (154 patents)
- Kazuyoshi Iwayama (17 patents)
- Hiroshi Konta (5 patents)
- Akira Kitamura (44 patents)
US Patent 6040490 · Granted Mar 21, 2000