Assignee
Inventors
- Shigeyuki Harada (55 patents)
- Kinichi Isaka (11 patents)
- Toshihiro Ohba (34 patents)
- Masashi Kawaguchi (19 patents)
- Hiroshi Kishishita (24 patents)
- Yoshiharu Kanatani (24 patents)
- Hisashi Uede (63 patents)
US Patent 4935671 · Granted Jun 19, 1990