Assignee
Inventors
- Takumi Ishiwaka (9 patents)
- Yukio Andoh (2 patents)
- Michiyuki Yamaguchi (3 patents)
- Shosuke Suzuki (9 patents)
- Yoshinori Egashira (50 patents)
- Takeo Yokobori (2 patents)
- Takashi Ohashi (71 patents)
US Patent 4887923 · Granted Dec 19, 1989