Assignee
Inventors
- Masuo Koizumi (7 patents)
- Kazuo Sasahara (3 patents)
- Yasushi Murakami (25 patents)
- Sakae Wada (1 patents)
- Hiroshi Nakakimura (3 patents)
- Noboru Kubodera (12 patents)
- Shun-ichi Hata (12 patents)
US Patent 4290953 · Granted Sep 22, 1981