Assignee
Inventors
- Norio Kawashima (11 patents)
- Yasuyuki Gotoh (34 patents)
- Akira Koizumi (19 patents)
- Kouichi Machida (5 patents)
- Yoshiharu Kikuchi (35 patents)
- Takayoshi Yasuda (27 patents)
- Yoshitaka Nishino (5 patents)
US Patent 6028906 · Granted Feb 22, 2000