Assignee
Inventors
- Kazumi Hirota (15 patents)
- Yotaro Tsutsumi (8 patents)
- Senji Itoh (5 patents)
- Tadahiko Katsura (15 patents)
- Kikuo Matsuoka (18 patents)
- Ichiro Hori (5 patents)
- Toshihiko Hayashi (42 patents)
US Patent 4428494 · Granted Jan 31, 1984