Assignee
Inventors
- Kazuto Kiyohara (13 patents)
- Toshiyuki Hagiwara (10 patents)
- Takanori Nakadate (7 patents)
- Ichiya Harada (5 patents)
- Kentaro Noguchi (3 patents)
- Shigeru Sakae (2 patents)
- Kazuhiro Okuma (9 patents)
US Patent 4877819 · Granted Oct 31, 1989