Assignee
Inventors
- Haruyuki Kawahara (17 patents)
- Shoji Takeda (34 patents)
- Hiroshi Oshima (46 patents)
- Kentaro Tomioka (57 patents)
- Shoji Akahane (17 patents)
- Eiichi Yoshii (6 patents)
- Kazuo Hirota (41 patents)
US Patent 4647600 · Granted Mar 3, 1987