Assignee
Inventors
- Akira Kanai (15 patents)
- Masaki Yamakawa (22 patents)
- Shoichi Sugihara (4 patents)
- Masaharu Hayakawa (23 patents)
- Kiyotaka Yamamoto (7 patents)
- Masafumi Kodama (6 patents)
- Akiko Maeno (4 patents)
US Patent 5648825 · Granted Jul 15, 1997