Assignee
Inventors
- Yoshihiro Ashihara (28 patents)
- Isao Nishizono (6 patents)
- Hidetaka Minakawa (3 patents)
- Masahisa Okada (16 patents)
- Yasusuke Sakurabayashi (4 patents)
- Fumio Watanabe (87 patents)
- Shin-ichi Wakana (6 patents)
US Patent 5290708 · Granted Mar 1, 1994