Assignee
Inventors
- Toshiaki Kawaguchi (1 patents)
- Tsutomu Sasaki (146 patents)
- Takaaki Fukumoto (43 patents)
- Yutaka Funada (1 patents)
- Isao Kubota (9 patents)
- Masaharu Hama (10 patents)
- Nobuyoshi Terada (2 patents)
US Patent 4834137 · Granted May 30, 1989