Assignee
Inventors
- Akira Bando (36 patents)
- Osamu Nagura (11 patents)
- Shigehiro Kayukawa (3 patents)
- Junichi Shiozaki (6 patents)
- Akira Momiyama (1 patents)
- Hiroto Nakagawa (29 patents)
- Yasuteru Oono (10 patents)
US Patent 4980629 · Granted Dec 25, 1990