Assignee
Inventors
- Takeshi Sada (14 patents)
- Hidetoshi Kato (30 patents)
- Hiroshi Shibata (231 patents)
- Kazumasa Mori (15 patents)
- Nobuo Mayumi (13 patents)
- Hirohide Sato (30 patents)
- Yoshio Akita (18 patents)
- Shigeru Tanaka (330 patents)
US Patent 4665354 · Granted May 12, 1987