Assignee
Inventors
- Ryosuke Toyama (1 patents)
- Hiroyuki Inoue (20 patents)
- Tetsuro Shingu (3 patents)
- Yoshio Takeda (8 patents)
- Takeshi Ikumoto (5 patents)
- Hidetoshi Okuyama (7 patents)
- Osamu Yamamoto (4 patents)
US Patent 4247698 · Granted Jan 27, 1981