Assignee
Inventors
- Tsunehisa Namiki (11 patents)
- Ikuo Sugiyama (5 patents)
- Tamio Fujiwara (14 patents)
- Kazuhisa Ishibashi (36 patents)
- Isao Tanikawa (17 patents)
- Muneki Yamada (36 patents)
- Kyuichi Shibasaki (4 patents)
US Patent 4992636 · Granted Feb 12, 1991