Assignee
Inventors
- Toshio Ishii (106 patents)
- Yutaka Okubo (10 patents)
- Shuzo Fukuda (17 patents)
- Yoshihiko Kawai (38 patents)
- Shunichi Sugiyama (14 patents)
- Yoshiteru Kikuchi (24 patents)
- Hidetoshi Matsuno (4 patents)
US Patent 5091000 · Granted Feb 25, 1992