Assignee
Inventors
- Takashi Sonobe (12 patents)
- Hiroitsu Kawata (15 patents)
- Masayoshi Aruga (17 patents)
- Tadayoshi Ohmura (10 patents)
- Satoru Yoneya (6 patents)
- Chiharu Yamada (1 patents)
- Yukio Kubota (2 patents)
US Patent 4758437 · Granted Jul 19, 1988