Assignee
Inventors
- Yasuo Yonezawa (20 patents)
- Masao Matsushita (6 patents)
- Kenzo Oku (2 patents)
- Hiroki Nakano (78 patents)
- Shin Okumura (12 patents)
- Motoshi Yoshihara (4 patents)
- Akiyoshi Sakai (5 patents)
- Atsushi Morikawa (16 patents)
US Patent 4881376 · Granted Nov 21, 1989