Assignee
Inventors
- Hajime Imai (85 patents)
- Shozo Kito (20 patents)
- Shoichi Harada (33 patents)
- Yoshinobu Yokoyama (9 patents)
- Syuzi Nakamura (3 patents)
- Shigetoshi Miyoshi (5 patents)
- Tadao Muramatsu (21 patents)
US Patent 5003799 · Granted Apr 2, 1991