Assignee
Inventors
- Hideo Ishida (25 patents)
- Toshiyuki Ochiai (12 patents)
- Yutaka Tanaka (169 patents)
- Teruto Hirota (71 patents)
- Akihiko Wada (11 patents)
- Eiichi Toyonaga (2 patents)
- Kunihiko Sakoda (4 patents)
US Patent 6141729 · Granted Oct 31, 2000